Statistics and Probability

Rose has invited 12 friends to her birthday party. If they all attend, and each one shakes hand with, everyone else at the party exactly once. what is the number of handshakes?

• 66

• 132

• 78

• 66

How many six-digit numbers are there?

• 900,000

• 100.000

• 151 ,200

• 210

How even many 7-digit number starts with 5?

• 1,000,000

• 5,000,000

• 500,000

• 100,000

In flipping a fair coin 23 times, what is the probability of all heads or all tails?

• 0.04

• 3.87x10^-23

• 0.00000024

• 135 mph

Two fair dice are thrown. What is the probability that the outcome is a 6 and odd number?

• 1/2

• 1/3

• 1/6

• 1 /12

A multiple-choice test has 15 questions, each having four possible answers, of which only one is correct. If the questions are answered at random, what is the probability of getting them a·II right?

• 16.67x10³

• 3.05x10^-5

• 1.98x10^-5

• 9.31x10^-10

How many four digit numbers can be formed using only the digits 2,4,6,8, and 9?

• 625

• 505

• 120

• 24

Two cards are drawn without replacement from a deck of 52 cards. What is the probability of drawing two queens?

• 1/13

• 1/121

• 1/17

• 1/221

What is the probability that one throw of two dice (one red and one green) will result in a sum of 10?

• 1/12

• 1/36

• 1/24

• 1/6

A bag contains 3 white marbles and 2 black marbles. Two marbles are drawn from the bag with the first marble not being returned to the bag for the second drawing. What is the probability of getting 1 white marble and 1 black marble?

• 1/2

• 2/15

• 3/5

• 3/10