Statistics Revision

In the experiment of throwing a fair die once, the probability of appearing a number greater than 4 is .............. .

• 
  

  $\frac{1}{3}$
  

• $\frac{2}{3}$

• $\frac{1}{2}$

• $\frac{1}{4}$

Which of the following is the probability of occurrence of an event?

• 
  

  $1.25$
  

• $-0.3$

• $215\%$

• $23\%$

A class has 15 boys and 20 girls. A pupil is selected randomly, then the probability that the pupil is a girl equals ................ .

• 
  

  $\frac{3}{4}$
  

• $\frac{4}{3}$

• $\frac{3}{7}$

• $\frac{4}{7}$

If the probability of success of a student is 75%, then the probability of his failure= .....% .

• 
  

   $0.75\%$  
  

•  $0.25$  

•  $75$  

•  $25$  

As throwing a fair die once, then the probability of having a number satisfies the inequality:

 $3<x<6$  is .......... .

•  $\frac{2}{3}$  

•  $\frac{1}{2}$  

•  $\frac{1}{3}$  

•  $\frac{1}{6}$  

If a letter is randomly selected from the word "NOVEMBER", then the probability of selecting the letter E is ......... .

• 
  

  $\frac{1}{8}$
  

• $\frac{3}{8}$

• $\frac{1}{4}$

• $1$

The probability of the impossible event = 0

• TRUE

• FALSE

If a coin is flipped once, then the probability of appearance of a tail =  $\frac{1}{2}$  

• TRUE

• FALSE

If the probability of occurrence of an event is  $\frac{3}{7}$  , then the probability of non-occurrence of this event is  $\frac{4}{7}$  .

• TRUE

• FALSE

A garden has 5 doors numbered from 1 to 5. A man got out from one of these doors then the probability that he got out of door number 5 is 1.

• TRUE

• FALSE