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(55x + 12 × 90)/(x + 12) = 65 => 55x + 1080 = 65x + 780 => 10x = 300 => x = 30
15 rotten bananas are accidentally mixed with 115 good ones. It is not possible to just look at a banana and tell whether or not it is rotten. One banan...
A box contains 6 Brown and 8 Blue caps. There is another box which contains 8 Brown and 7 Blue caps. One cap is to drawn from either of the two boxes. ...
There are 14 boys and 6 girls giving interview for a job. If three of them are selected, then what is the probability that one of the three is a girl an...
A bag contains 13 white and some black balls. If the probability of drawing a black ball from the bag is 3 times that of drawing a white ball, find the ...
A bag contains 18 black and 20 white balls. One ball is drawn at random. What is the probability that the ball drawn is white?
What is the probability that a number selected from 1,2,3.......................68,69,70, is perfect square or a perfect cube?
Two hats are picked at random, what is the probability that one is blue and one is yellow?
In a lottery, there are 8 prizes and 20 blanks. A lottery is drawn at random. What is the probability of getting a prize?
...A black and a red dice are rolled. Find the conditional probability of obtaining a sum greater than 9, given that the black die resulted in a 5.
Out of three girls and five boys, five children are to be randomly selected for a dance programme. What is the probability that all the selected childre...
