9th CHP 15 PROBABILITY

A die is thrown 1000 times and outcomes were recorded as follows , if the die is thrown once more, then the probability that die shows 5 is

• 
  

  $\frac{9}{50}$

• $\frac{3}{20}$

• 
  

  $\frac{4}{25}$

• $\frac{7}{25}$

A coin is tossed 175 times and tail appears 38 times . If this coin is tossed once again, then the probability of getting head is

• 
  

  $\frac{138}{175}$

• $\frac{38}{175}$

• $\frac{37}{175}$

• $\frac{137}{175}$

In a sample study 642 people , it was found that 514 people have high school certificate. If a person is selected at random, then the probability that the person has a high school certificate is

• 0.5

• 0.6

• 0.7

• 0.8

On a particular day, 30 students are present in a class and another 10 are absent. The teacher calls out attendance of a particular roll number. What is the probability that the student is absent ?

• $\frac{1}{3}$

• $\frac{1}{2}$

• $\frac{3}{4}$

• $\frac{1}{24}$

In a press conference, 150 persons appeared .out of which 80 were retired army mam, 40 were retired principals and 30 others from different departments. A person is selected at random. What is the probability that selected person is a retired army man?

• 8/15

• 5/31

• 15/17

• 13/15

Heena dialed a phone 📞 number 100 times in a week , out of which she gets the response 36 times. The probability that she will not get response is

• 55/100

• 100/55

• 45/100

• 64/100

35 students participating in a debate competition. Out of these , 13 are girls and rest are boys. A student is chosen at random. The probability that the chosen student is a boy is

• 
  

  $\frac{8}{25}$

• $\frac{8}{33}$

• $\frac{17}{33}$

• $\frac{22}{35}$

A survey of 200 persons of a locality shows the liking and disliking of tea

out of these persons one was chosen at random. What is the probability that the chosen person likes the tea?

• $\frac{13}{37}$

• $\frac{37}{13}$

• $\frac{13}{50}$

• $\frac{37}{50}$

In 50 tosses of coin , tail appears 32 times. If coin is tossed at random, what is the probability of getting a head ?

• $\frac{1}{32}$

• $\frac{1}{18}$

• $\frac{16}{25}$

• $\frac{9}{25}$

In 50 throws of a die, the outcomes were noted as given:

A die is thrown at random . What is the probability of getting an even number ?

• $\frac{12}{25}$

• $\frac{3}{50}$

• $\frac{1}{8}$

• $\frac{1}{2}$