Question

Tickets are numbered from 1 to 100. These are well shuffled and a ticket is drawn at random. What is the probability that the drawn ticket is a number? a) greater than 75? b) a perfect square?

Answer 1

Answer:

a) 3/20

b) 1/10

Probability of event greater than 75 = 15/100 =3/20

Probability of event of a perfect square = 10/100 =1/10

Answer 2

Answer:

(a) probability of a ticket number greater than 75 is 0.25

(b) probability of getting a perfect square between 1-100 is 0.1

Step-by-step explanation:

given, the tickets are numbered from 1 to 100

$P[event]= \frac{number \ of \ favorable \ outcomes}{total \ number \ of \ outcomes}$

(a) numbers greater  than 75 = numbers from 76-100

total 25 outcomes

probability of a ticket number greater than 75 = $\frac{25}{100}$

                              = $\frac{1}{4}$ = 0.25

(b) perfect squares from 1- 100 are 1, 4, 9 , 16, 25, 36, 49, 64, 81, 100

there are total 10 outcomes

probability of getting a perfect square = $\frac{10}{100}$

                                 = $\frac{1}{10}$  = 0.1