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One ticket is selected at random from 100 tickets numbered00,01,02,...,98,99. If `x_1, a n dx_2`denotes the sum and product of the digits on the tickets, then `P(x_1=9//x_2=0)`is equal to`2//19`b. `19//100`c. `1//50`d. none of these |
Answer» Correct Answer - A Let the number selected be xy. Then `x+y=9,0lex,yle9` `and xy=0impliesx=0,y=9or y=0,x=9` `P(x_(1)=9//x_(2)=0)(P(x_(1)=9nnx_(2)=0))/(P(x_(2)=0))` Now, `P(x_(2)=0)=19/100` `andP(x_(1)=9nnx_(2)=0)2/100` `impliesP(x_(1)=9//x_(2)=0)=(2//100)/(19//100)=2/19` |
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