Question

The probability of student missing a surprise test is 2/9. If
a student gets absent
twice, find the probability of her
missing at least one surprise test.
779
19/21
32/81
49/81​

Answer 1

Step-by-step explanation:

We know that

P(ϵ)+P(ϵ)=1

P(ϵ)= Event ϵ occurs

P(ϵ)= Event does not occurs

P (miss. no tests) =P (no test on day 1 and no test on day 2)

=P (no test on day 1)×P (no test on day 2)

=54×54

=2516

So, P (miss at least 1 test) =1−2516

=2525−16

=259

Hence, this is the answer.

Answer 2

Answer:

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Step-by-step explanation:

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