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Question

The probability of obtaining an even prime number on each die, when a pair of dice is rolled is

A
136
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B
0
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C
13
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D
112
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Solution

The correct option is A 136
Sample space when pair of die are thrown,

S=⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪(1,1)(1,2)(1,3)(1,4)(1,5),(1,6),(2,1)(2,2)(2,3)(2,4)(2,5)(2,6)(3,1)(3,2)(3,3)(3,4)(3,5)(3,6)(4,1)(4,2)(4,3)(4,4)(4,5)(4,6)(5,1)(5,2)(5,3)(5,4)(5,5)(5,6)(6,1)(6,2)(6,3)(6,4)(6,5)(6,6)⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪

n(S)=36

Let E be the favourable event of gettng even prime number on both die

E=(2,2)

Probability of getting even prime number on both die

P(E)=136

Probability of obtaining an even prime number on each die =136

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