Probability Practice Test 2

Question : 1 of 37

Marks: +1, -0

The probability that an event A happens in one trial of an experiment is 0.7. Three independent trials of the experiment are performed. The probability that the event A happens atleast once is

0.657
0.973
0.189
None of these

Validate

Solution:

P(A) = 0.7

∴ P (\ov A) = 0.3

P(at least once) = 1 – P (no occurrence)

= 1 - (0.3)^3 = 0.973 .

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