Question

Cards marked with numbers from 1 to 20 are placed in a box and mixed thoroughly. One

card is drawn at random from the box. Find the probability that number on the card drawn

is a perfect square.

(a) 0.2 (b) 0.4 (c) 0.8 (d) 0.25​

Answer 1

Answer:

1)Number on cards are 2 to 101

Even number are 2,4,6,..,100=50

Probability that it's an even number =50/100=1/2

solve in this method

Answer 2

Step-by-step explanation:

QUESTION:

Cards marked with numbers from 1 to 20 are placed in a box and mixed thoroughly. One card is drawn at random from the box. Find the probability that number on the card drawn is a perfect square.

is drawn at random from the box. Find the probability that number on the card drawn is a perfect square.(a) 0.2 (b) 0.4 (c) 0.8 (d) 0.25

SOLUTION:

Total number of cards = 20

Number of cards with a perfect square = 4 { 1, 4, 9, 16 }

∴P ( getting a perfect square numbered card ) =

$\frac{4}{20} \\ = \frac{1}{5} \\ = 0.2$

HENCE, probability of getting a perfect square numbered card is 0.2 (option:a)