In a simultaneous throw of two coins, the probability of getting at least one head is

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Question

This question was previously asked in

ISRO VSSC Technical Assistant Mechanical 9 June 2019 Official Paper

Answer 1

Explanation:

When a coin is tossed, there are only two possible outcomes, either heads or tails.

We know that the sample space S = {HH, HT, TH, TT}

The Event E that at least one of them is head = {HH, HT, TH}

Probability P(E) = \(\frac{n(e)}{n(s)}\) = \(\frac34\).

The probability of getting at least one head is \(\frac34\).