Q) In a TV show, a contestant opts for video call a friend life line to get an answer from three of his friends, named Amar, Akbar & Anthony. The question which he asks from one of his friends has four options. Find the probability that:
(a) Akbar is chosen for the call.
(b) Akbar couldn’t give the correct answer.

ICSE Specimen Question Paper (SQP)2025

Ans:

a) Probability of Akbar is chosen for the call:

Total number of friends = 3 ( i. e. total outcomes)

If Akbar is chosen, then favorable outcome = 1

∵ Probability =

Therefore, the probability of Akbar is chosen for the call

(ii) Probability of Akbar gives wrong answer:

Step 1: ∵ Given that options of the answer = 4  (i.e. total outcomes)

Since only one answer is to be given, ∴ possible favorable outcomes = 1

∵ Probability of giving correct answer = Probability of choosing correct option

=

Step 2: ∴ Probability of giving incorrect answer = 1 – Probability of giving correct answer

= 1 –

Therefore, the probability of Akbar giving incorrect answer is

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