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Probability 1-3

13Find the probability that a number selected at random from 1 to 40 is divisible by either 4 or 6.
A1/10
B5/10
C2/10
D3/10


14A box contain 14 apples out of which 5 are spoilt. If 5 apples are chosen at random, find the probability that all the 5 apples are spoilt.
A1/12225
B1/12852
C1/18018
D1/12552


15A box contain 12 batteries out of which 7 are defective. 3 batteries are drawn from box at random. What is the probability that there is at least one defective battery?
A24/44
B22/44
C21/22
D25/44


168 girls sit in a row randomly. What is the probability that 4 particular girls always sit together?
A1/14
B5/14
C7/14
D4/14


17The probability that A speaks truth is 5/12 and the probability that B speak truth is 5/14. What is the probability that both speak falsehood while making a statement?
A2/8
B1/8
C3/8
D5/8


18Bag $P$ contain $6$ Red marbles and $5$ blue marbles while Bag $Q$ contain $5$ Red marbles and $6$ blue marbles. Two marbles, one each from the two bags are drawn at random. What is the probability that both the marbles are of same colour?
A9/121
B95/121
C60/121
D98/121


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