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Answer:
46) probability of an event.
47) 18
48)2/10 or 1/5
49) part A
50)1/25
Step-by-step explanation:
Solutions:-
46)Option (D)
Probability of an Event
47)Option (C)
Total choices in main dish = 3
Total choices in vegetables = 2
Total choices in drink = 3
Total number of all choices = 3+2+3 = 8
48)Option (A)
The number of Blue socks = 3 pairs
The number of Green socks = 5 pairs
The number of White socks = 2 pairs
Total number of all pairs = 3+5+2 = 10 pairs
Total number of all possible outcomes = 10
Number of favourable outcomes to pair of White socks = 2
Probability of an event = Number of favourable outcomes/ Total number of all possible outcomes
=> Probability of getting a pair of Whits socks
=> 2/10
=> 1/5
49)Option (A)
Total number of envelopes = 200
Total number of all possible outcomes = 200
Number of envelopes contains P500 = 20
Number of envelopes contains P100 = 40
Number of empty envelopes =
200-(20+40)
= 200-60
= 140
Probability of getting an envelope P500
Probability of an event = Number of favourable outcomes/ Total number of all possible outcomes
= 20/200
= 1/10
=10%
Probability of getting an envelope P 100
Probability of an event = Number of favourable outcomes/ Total number of all possible outcomes
= 40/200
=4/20
= 1/5
=20%
50) Option (B)
Total number of balls = 50
Total number of red balls = 20
Probability of an event = Number of favourable outcomes/ Total number of all possible outcomes
Probability of getting a red ball = 20/50 = 2/5
Probability of getting green ball = 5/50 = 1/10
Probability of getting two balls first red and second green
= (20/50)+(5/50)
=> (20+5)/50
=> 25/50
=> 1/2
Used formulae:-
Probability of an event = Number of favourable outcomes/ Total number of all possible outcomes