Ram put some buttons on the table. There were 4 blue, 7 red, 3 black and 6 white buttons in all. All of a sudden, a cat jumped on the table and knocked out one button on the floor. What is the probability that the button on the floor is blue?
(a) 7/20
(b) 3/5
(c) 1/5
(d) 1/4

Solution:

Given there are 4 blue, 7 red, 3 black and 6 white buttons on the table

Total there are 20 buttons

When the cat knocks out a button, then the probability is 1/20

Required probability that it is blue = 4C1/20C1=4/20=1/5

✦ Try This: Ram put some buttons on the table. There were 4 blue, 7 red, 3 black and 6 white buttons in all. All of a sudden, a cat jumped on the table and knocked out one button on the floor. What is the probability that the button on the floor is red? (a) 7/20, (b) 3/5, (c) 1/5, (d) 1/7

Given there are 4 blue, 7 red, 3 black and 6 white buttons on the table

Total there are 20 buttons

When the cat knocks out a button, then the probability is 1/20

Required probability of getting red = 1/7

☛ Also Check: NCERT Solutions for Class 8 Maths Chapter 5

NCERT Exemplar Class 8 Maths Chapter 2 Problem 12

Ram put some buttons on the table. There were 4 blue, 7 red, 3 black and 6 white buttons in all. All of a sudden, a cat jumped on the table and knocked out one button on the floor. What is the probability that the button on the floor is blue? (a) 7/20, (b) 3/5, (c) 1/5, (d) 1/4

Summary:

Ram put some buttons on the table. There were 4 blue, 7 red, 3 black and 6 white buttons in all. All of a sudden, a cat jumped on the table and knocked out one button on the floor.The probability that the button on the floor is blue is 1/5

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