Blood Composition NEET 2026: Counts from 8000 WBCs

What is the correct answer to the blood composition NEET 2026 question with 8000 WBCs?

Option B is correct, with eosinophils first and lymphocytes second. The blood composition NEET 2026 question gives a sample containing 8000 white blood cells per cubic millimetre and asks for the approximate counts of these two WBC types, in that order.

The supplied choices, all in cells/cu mm, are:

300 – 500 and 1200 – 1500

160 – 240 and 1600 – 2000

300 – 500 and 500 – 700

100 – 120 and 160 – 200

This is a single-correct question, tagged medium on the question bank’s own scale. Its 45-second target belongs to the question bank, not an official per-question time allowance. Both entries must match, so checking only the lymphocyte count is not enough.

Which total should you use to calculate eosinophils and lymphocytes?

Use total WBCs as the denominator, not all blood cells, plasma or blood volume. Apply the official solution’s ranges:

Eosinophils: 2 – 3 % of total WBCs

Lymphocytes: 20 – 25 % of total WBCs

For either subtype, divide its percentage by 100 and multiply by the total WBC count. Use the same denominator for both cell types:

Subtypecountpercumm = \frac{percentage}{100} \times totalWBCcountpercumm

A percentage range needs two calculations, one for its lower endpoint and one for its upper endpoint. Do not replace it with a midpoint: that produces one count, while the options ask for a range.

“Cu mm” means cubic millimetre. Dividing a percentage by 100 gives a dimensionless fraction, so multiplying by that fraction preserves the unit, cells per cubic millimetre. You are finding a share of the WBC count, not changing the sample volume.

How do you calculate all four cell-count endpoints?

Divide each percentage endpoint by 100, then multiply by 8000. Keep the two cell types separate until all four calculations are complete, then compare their ranges with the options in the requested order.

Eosinophil lower endpoint:

\frac{2}{100} \times 8000 = 0.02 \times 8000 = 160 cells/cumm

Eosinophil upper endpoint:

\frac{3}{100} \times 8000 = 0.03 \times 8000 = 240 cells/cumm

Lymphocyte lower endpoint:

\frac{20}{100} \times 8000 = 0.20 \times 8000 = 1600 cells/cumm

Lymphocyte upper endpoint:

\frac{25}{100} \times 8000 = 0.25 \times 8000 = 2000 cells/cumm

The ordered answer is:

\underset{eosinophils}{\underset{⏟}{160 – 240}} and \underset{lymphocytes}{\underset{⏟}{1600 – 2000}} cells/cumm

Both ranges match option B. “Approximately” reflects applying the supplied percentage ranges; it does not require rounding either result to a different option.

After the full working, use this arithmetic check:

1 % of 8000 = \frac{8000}{100} = 80

2 \times 80 = 160, 3 \times 80 = 240

20 \times 80 = 1600, 25 \times 80 = 2000

For a timed repeat, I would use this one-percent method because it avoids repeated decimal multiplication. Keep all four endpoint checks even when doing the arithmetic mentally.

How can a percentage error and checking only half an option lead to D?

Option D can result from two separate method errors: making the lymphocyte percentages ten times too small, then accepting the option without checking its eosinophil entry. The decimal mistake alone does not explain both counts in D.

Here is the incorrect conversion and its result:

20 % \overset{incorrect}{\to} 0.02, 25 % \overset{incorrect}{\to} 0.025

0.02 \times 8000 = 160, 0.025 \times 8000 = 200

Those fractions actually represent:

0.02 = 2 %, 0.025 = 2.5 %

The resulting lymphocyte range is ten times too small, but it matches D’s second entry. Selecting D at that point adds a second error: treating one matching entry as proof that the whole option is correct.

D’s eosinophil entry also fails independently:

D gives 100 – 120 instead of 160 – 240 cells/cumm

The lymphocyte conversion error does not produce that first range. To prevent both errors, divide percentages by 100, calculate both cell types and check their order before selecting an option.

How do you solve three related Human Physiology percentage questions?

Use percentage of a total to find a subtype count, part divided by whole to find its percentage, and part divided by its fractional share to recover the total. The following are original practice questions from the same chapter, not additional verified NEET PYQs.

These are hypothetical exam calculations, not clinical interpretations of blood-test results. Attempt each calculation before reading its working.

What are both ranges if the WBC count is 6000 per cu mm?

The eosinophil range is 120 to 180 cells/cu mm, and the lymphocyte range is 1200 to 1500 cells/cu mm. The operation is percentage of a total: the total changes, but the supplied percentage ranges stay the same.

Eosinophils = 6000 \times \frac{2}{100} to 6000 \times \frac{3}{100} = 120 – 180 cells/cumm

Lymphocytes = 6000 \times \frac{20}{100} to 6000 \times \frac{25}{100} = 1200 – 1500 cells/cumm

What percentage is 1800 lymphocytes out of 8000 WBCs per cu mm?

The lymphocyte share is 22.5 percent, within the question’s supplied range. The operation is part divided by whole, followed by multiplication by 100 to express the fraction as a percentage.

\frac{1800}{8000} \times 100 = 22.5 %

$20 % \leq 22.5 % \leq 25 %$ Both counts refer to the same unit volume, so their units cancel in the ratio.

What is the total WBC count if 240 eosinophils per cu mm represent exactly three percent?

The total is 8000 WBCs per cu mm. The operation is part divided by its fractional share, because the known eosinophil count represents only three percent of the whole.

Total WBC count = 240 \div 0.03 = 8000 cells/cumm

Do not multiply by the fraction here: you are recovering the whole, not finding a smaller part. Establish the WBC denominator, convert the percentage correctly and retain the unit.

Next step: the past-paper archive on NEET JEEnius AI and search past NEET papers by year, subject or chapter, each with a worked solution (100 free searches a month).

Frequently asked questions

What is the correct answer to the blood composition question with 8000 WBCs?

Option B is correct: 160–240 eosinophils and 1600–2000 lymphocytes per cubic millimetre. These counts use the solution’s supplied ranges of 2–3% and 20–25% of total WBCs, respectively. Both ranges must match in the requested order.

Do I calculate eosinophil percentages from total blood cells or total WBCs?

Use total WBCs, not total blood cells, plasma or blood volume. Divide each percentage endpoint by 100 and multiply by the total WBC count. The result retains the unit cells per cubic millimetre.

What is the fastest way to calculate WBC subtype counts from 8000?

Start with 1% of 8000, which is 80. Multiply 80 by 2 and 3 to get the eosinophil endpoints, 160 and 240, and by 20 and 25 to get the lymphocyte endpoints, 1600 and 2000. Check all four endpoints before choosing an option.

Why is option D wrong in the 8000 WBC question?

Option D gives 100–120 eosinophils and 160–200 lymphocytes per cubic millimetre, so both entries fail. Incorrectly converting 20% and 25% to 0.02 and 0.025 produces D’s lymphocyte range, but does not explain its eosinophil range. Selecting D also means accepting one matching entry without checking the other.