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The probability that a teacher will give an announced test during any class meeting is 1/5 .

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The probability that a teacher will give an announced test during any class meeting is 1/5 . If a student is absent twice, then the probability that the student will miss at least one test is :

(a) 9/25

(b) 7/75

(c) 2/5  

(d) 4/ 5

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1 Answer

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Best answer

Correct option (a) 9/25

Explanation:

The probability that one test is held

Probability that test is held on both days

Thus, probability that the student misses at least one test

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