When a number is increased by 30% then the number obtained is 51 less than thrice the original number. Find the original number.
Let the original number be ‘x’. According to the question, => x × 1.3 + 51 = 3x => x = 30
In a lottery, there are 11 prizes and 22 blanks. A lottery is drawn at random. What is the probability of getting a prize?
...One summer peter visits 4 villages (A, B, C and D) in a random order. Find the probability that he visits (i) A before B (ii) A before B and B before C ...
The probability of selecting a rotten apple randomly from a heap of 350 apples is 0.18. What is the number of rotten apples in the heap?
...A box contains only three colors of balls- red, green and blue. What is the minimum number of balls that should be picked from the box to ensure that at...
5 coins are tossed together. What is the probability of getting exactly 3 tails?
A box contains 6 red, 4 blue, 2 green and 4 yellow pens. Two pens are picked at random, what is the probability that one is blue and one is yellow?
Two cards are drawn at random from a pack of 52 cards. What is the probability that either both are black or both are queens?
In a lottery there are 5 prizes and 50 blanks. A lottery is drawn at random. What is the probability of getting the prize?
...A card is drawn randomly from a collection of total face cards. What is the probability that the drawn card is a jack?
A bag contains 20 black and 22 white balls. One ball is drawn at random. What is the probability that the ball drawn is white?
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