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(#M40013375) ITC Numerical Ability question Keep an EYE

Q. Two diced are tossed the probability that the total score is a prime number?

Asked In ITC (12 years ago)

Solved mohd zubair khan Read Solution (9)

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Read Solution (9) :

mohd zubair khan  (12 years ago)

possible outcomes for prime number = 2,3,5,7,11
so for 2=(1,1)= only 1 possible combination
for 3= (2,1) (1,2) = 2 combinations
for 5= (2,3) (3,2)(4,1) (1,4) = 4 combinations
for 7= (6,1) (1,6) (2,5) (5,2) (3,4) (4,3) = 6 combinations
for 11= (6,1),(1,6) = 2 combinations
total = 15
possible total outcomes = 6 x 6 = 36
so probability of getting a toatal of prime number = 15/36
=5/12 ans

Is this solution Helpfull? Yes (20) | No (2)  

sagar  (12 years ago)

sample space 36
events 15
15/36
===5/12

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S Prakash  (11 years ago)

probability of prime numbers is: 16/36.
prime numbers 2,3,5,7,11.
possibilities are (1,1),(1,1),(2,1),(1,2),(2,3),(3,2),(3,4),(4,3),(2,5),(5,2),(6,1),(1,6),(4,1),(1,4),(5,6),(6,5).
the answer is = 16/36

Is this solution Helpfull? Yes (1) | No (9)  

amit  (11 years ago)

5/12
prime numbr in 2,3,5,7,11 and and thr combination in two dice then i get 5/12

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Mallikarjuna M  (10 years ago)

answer is 5/12

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ASHISH AGARWAL  (9 years ago)

sum shoul be prime
so, prob.= 15/36

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amrita tripathi  (8 years ago)

ans- 5/12
the sets producing prime nos. are
1,1 1,2 1,4 1,6
2,1 2,3 2,5
3,2 3,4
4,1 4,3
5,2 5,6
6,1 6,5
these are 15 sets.
total no. of sets = 6 X 6 =36
prob. = 15/36 = 5/12

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uttam  (7 years ago)

3/6*3/6=1/4

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Diksha Das  (5 years ago)

(1,1) (1,2) (1,6) (2,3) (2,1) (2,5) (3,2) (4,3) (3,4) (5,2) (6,1)
11/36

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