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In a test for ESP, a subject tries to identify what is on the back of...

In a test for ESP, a subject tries to identify what is on the back of a card. The experimenter can see the back, but the subject cannot. The cards contain either a star, a circle, a wave, a square, or an X. Each of these options is equally likely and the selection is random. A subject looks at 100 cards, and correctly identifies 30 of them. What is the probability of doing so, given that ESP doesn’t exist?

Math   Statistics-And-Probability   
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Answer #1

Probability calculation by binomial probability distribution.

Here required probability is 0.00519

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