Find the : Probability of the pointer stopping on D in (Question 1-(a))?

Find the (a) Probability of the pointer stopping on D ? (b) Probability of getting an ace from a well shuffled deck of 52 playing cards. (c ) Probability of getting a red apple (See the fig.)

Find the probability of getting a green sector.

Find the probability of not getting a green sector.

The probability of guessing the correct answer to a certain question is x/2 .If the probability of not guessing the correct answer is 2/3 . Find x

In a test, an examinee either guesses or copies or knows the answer to a multiple choice question with four choices. The probability that he makes a guess is 1/3 and the probability that he copies the answer is 1/6. The probability that his answer is correct given that he copied it is 1/8. Find the probability that he knew the answer to the question, given that he correctly answered it.

Find the probability of getting a head when a coin is tossed once. Also find the probability of getting a tail.

The probability of finding electron in d_(xy) orbital is :

Find the probability distribution for the number of girls in a family with three children, assuming equal probability for a child being a boy or a girl.