Grade 10, Chapter (7) - Probability

A die is rolled. The probability of getting a factor of 108 is

• $\frac{5}{6}$

• $\frac{5}{12}$

• $\frac{1}{4}$

• $\frac{3}{5}$

Two dice are thrown. The probability that the total score will be a prime number is

• $\frac{5}{6}$

• $\frac{5}{12}$

• $\frac{1}{4}$

• $\frac{3}{5}$

Two fair coins are tossed. The probability of getting two heads is

•  $\frac{5}{6}$  

•  $\frac{5}{12}$  

•  $\frac{1}{4}$  

•  $\frac{3}{5}$  

A number is chosen from 1, 2, 3, …, 20. The probability that it is not a prime number is

• $\frac{5}{6}$

• $\frac{5}{12}$

• $\frac{1}{4}$

• $\frac{3}{5}$

A spinner is equally likely to point to any one of the numbers 1, 2, 3, 4, 5, 6, 7, 8, 9. Then the probability of scoring a number divisible by 3 is

• $\frac{1}{3}$

• $\frac{1}{2}$

• $\frac{3}{4}$

• $\frac{1}{5}$

Tags

CCSS.7.SP.C.7A

The probability of an event occurring is twice the probability of the event not occurring. Then the probability of the event not occurring is

• $\frac{1}{2}$

• $\frac{1}{3}$

• $\frac{3}{4}$

• $\frac{1}{5}$

Tags

CCSS.7.SP.C.5

A coin is tossed two times. The probability of getting at least one tail is

• $\frac{1}{2}$

• $\frac{1}{3}$

• $\frac{3}{4}$

• $\frac{1}{5}$

The probability that the outcome A will not occur is four times the probability that A will occur. Then P(A) =

•  $\frac{1}{2}$  

•  $\frac{1}{3}$  

•  $\frac{3}{4}$  

•  $\frac{1}{5}$  

Tags

CCSS.HSS.CP.A.2

CCSS.HSS.CP.A.4

If a die is rolled 90 times, the excepted frequency of a number divisible by 3 is

• 30

• 1.25

• 1.36

• 64

Tags

CCSS.7.SP.C.6

Let A and B be two events such that P(A) + P(B) = 0.75 then P(not A) + P(not B) =

• 30

• 1.25

• 1.36

• 64