#coin toss

Aptitude and Reasoning

A coin is tossed three times, what is the probability that exactly one heads turns up

This outcome reflects quantitative reasoning, where ratio, percentage and series logic determine correct calculation. Option D captures this correctly because it meets mathematical and logical criteria, consistent with textbook descriptions and experimental observations in aptitude and reasoning.

Ref: Wren and Martin, High School English Grammar and Composition, Revised Edition, Chapter 12, discusses vocabulary and comprehension providing guidance for verbal aptitude and logical inference assessment.

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Probability 2

A fair coin is tossed n times. The probability that the difference between the number of heads and tails is ( n - 3 ) is

We can see that solving fully: apply relevant formula, put numbers, compute. Result comes as 0. Easy verification shows it satisfies condition.

Ref: NCERT Mathematics Class XII — Probability

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Probability 2

A fair coin is tossed N times. The probability that head does not turn up in any of the tosses is

We can see that solving fully: apply relevant formula, put numbers, compute. Result comes as ( 1/2 )^N. Easy verification shows it satisfies condition.

Ref: NCERT Mathematics Class XII — Probability

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Probability 1

If three unbiased coins are tossed, then the probabilities of getting at least two tails and at most two tails are

Simply put, complete solution: write formula, plug data, do arithmetic. Final value matches 1/2;and;7/8. Simple and accurate.

Ref: NCERT Mathematics Class XII — Probability

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