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كيف احل ذي

A student takes a 8-question multiple choice quiz with 4 choices for each question. If the student guesses at random on each question, what is the probability that the student get zero score in this quiz?

0.1
0.12
0.35
0.07

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A group consisting of 4 numbers is to be formed from 10 even numbers and 8 odd numbers. Findthe probability that the group will consist of even number only.

0.119
0.049
0.069
0.039

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If the letters A,B,C,D,E, and F are to be used in a letter code consists of 7 digits, how many differentcodes are possible if the first letter must be A and repetitions are not permitted?

-4
0
5
7