PROBABILITY

1.Three coins are tossed. Find the probability of getting at least 1 tail.

A. 7/8B. 6/7C. 5/6D. 4/5

2,A box contains 7 blue marbles, 6 red marbles, and 4 white marbles. If a'marble is picked at random, what is the probability that it is blue marbles?

A.4/17B. 6/17C. 7/17D. 4/13

3.A committee of three is to be chosen at random from a group of 5 students consisting of 3 boys and2 girls. What is the probabilitythat a committee consisting of 2 boys and 1 girl will be chosen?

A. 1/10B. 2/5C. 3/10D. 3/5

4.There are x + 5 red balls, x blue balls, and x + 10 white balls in a box. One ball is selected at random from the box. If the probability that the selected ball is blue is equal to 1/8, what is the value of x?

A. 2B. 3C. 4D. 5

5.In number 4, there are x + 5 red balls, x blue balls, and x + 10 white balls in a box. One ball is selected at random from the box. If the value of x is 12, what is the probability that the selected ball is white?

A. 12/51B. 17/51C. 22/51D. 29/51