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What is a complementary event for “At least one head appears” if two coins are tossed simultaneously?

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in Mathematics - Class 11 by (789k points)
What is a complementary event for “At least one head appears” if two coins are tossed simultaneously?

(a) Exactly one head appears

(b) At least one tail appears

(c) At most one tail appears

(d) None head appears

I have been asked this question in an interview.

The question is from Probability topic in portion Probability of Mathematics – Class 11

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The correct option is (d) None head appears

The explanation is: We know complementary of at least one is none. So, complementary event for “At least one head appears” is none head appears.

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