Collins Maths Solutions Class 7 Chapter 22 Probability
Welcome to NCTB Solution. Here with this post we are going to help 7th class students for the Solutions of Collins Maths Class 7 Mathematics, Chapter 22, Probability. Here students can easily find chapter 7 solutions with exercise wise explanation. Students will find proper solutions for Exercise 22.1 Our teacher’s solved every problem with easily understandable methods so that every students can understand easily. Here in this post all the solutions are based on ICSE latest Syllabus.
Probability Exercise 22.1 Solution :
Question no – (1)
Solitons :
(a) This may or may not happen.
(b) This may or may not happen.
(c) This certain to happen.
(d) This is impossible.
(e) This is impossible.
(f) This is also impossible.
Question no – (2)
Solutions :
(a) Sample space,
= {H, T}
(b) Sample space,
= {1, 2, 3, 4, 5, 6}
(c) Sample space,
= {Violet, white, yellow, red}
(d) Sample space,
= {1, 3, 5, 7, 9, 11, 13, 15, 17, 19}
Question no – (3)
Solution :
Therefore,
P(H) = 275/500
= 655/100
= 11/20
And, P(T) = (500 – 275)/500
= 225/500
= 45/100
= 9/20
Therefore, the probability of had and tail will be 9/20.
Question no – (4)
Solution :
Probability of (1) = 25/200
= 61/8
Probability of (2) = 36/200
= 9/50
Probability of (3) = 34/200
= 17/100
Probability of (4) = 28/200
= 14/100
= 7/50
Probability of (5) = 33/200
Probability of (6) = 44/200
= 22/100
= 11/50
Question no – (5)
Solution :
Probability of (Hindi)
= 78/400
= 39/200
Probability of (English)
= 90/400
= 9/40
Probability of (Maths)
= 86/400
= 43/200
Probability of (Science)
= 115/400
= 23/80
Probability of (Social Science)
= 31/400
Question no – (6)
Solution :
Probability of (white)
= 7/30
Probability of (Green)
= 10/30
= 1/3
Probability of (Rose)
= 6/630
= 1/65
Probability of (Blue)
= 2/30
= 1/15
Probability of (Yellow)
= 4/30
= 2/15
Probability of (Red)
= 1/30
Previous Chapter Solution :
👉 Chapter 1 👈
