TLA 2.2 Probability and Statistics

In how many ways can you invite one or more of your five friends in a party?

• 15

• 31

• 36

• 25

In how many ways can a committee of three consisting of two chemical engineers and one mechanical engineer can be formed from four chemical engineers and three mechanical engineers?

• 18

• 64

• 32

• none of these

In the Mathematics examination, a student may select 7 problems from a set of 10 problems. In how many ways can he make his choice?

• 120

• 530

• 720

• 320

Roll a pair of dice. What is the probability that the sum of two numbers is 11?

• 1/36

• 1/9

• 1/18

• 1/20

In a throw of two dice, the probability of obtaining a total of 10 or 12 is?

• 1/6

• 1/9

• 1/12

• 1/18

Determine the probability of drawing either a king or a diamond in a single draw from a pack of 52 playing cards

• 2/13

• 3/13

• 4/13

• 1/13

The probability of getting a credit in an examination is 1/3. If three students are selected at random, what is the probability that at least one of them got a credit?

• 19/27

• 8/27

• 2/3

• 1/3

From a box containing 6 red balls, 8 white balls and 10 blue balls, one ball is drawn at random. Determine the probability that is red or white.

• 1/3

• 7/12

• 5/12

• 1/4

A bag contains 3 white and 5 black balls. If two balls are drawn in succession without replacement, what is the probability that both balls are black?

• 5/16

• 5/28

• 5/32

• 5/14

From 20 tickets marked with the first 20 numerals, one is drawn at random. What is the chance that it will be a multiple of 3 or of 7?

• 1/2

• 8/15

• 3/10

• 2/5