What is the probability that a number selected from 1,2,3.......................68,69,70, is perfect square or a perfect cube?
Favourable outcomes = 1, 4, 8, 9, 16, 25, 27, 36, 49, 64 No. of favourable outcomes = 10 No. of total outcomes = 70 ∴ Required probability = 10/70 = 1/7
The number of boys and girls in a school is 200 and 320 respectively. 20% of boys left the school while 40 girls took admission in the school. Find the ...
In a Lok Sabha election, two candidates vied for a parliamentary seat. Out of the total eligible voters in the constituency, 20% opted not to exercise t...
In a mixed school 25% of the scholars are infants under 7 and the number of girls above 7 is 4/5 of the number of boys above 7, is 120. Find the number ...
Aman uses 70% of his monthly earnings, resulting in monthly expenses of Rs. 22,750. Riva's savings are 60% higher than Aman's and constitute 40% of her ...
A student has to obtain 35% of the total marks to pass. He got 214 marks and failed by 31 marks. What are the maximum marks?
Initially, a person spends 65% of his salary and saves the remainder. When his salary is increased by 40%, his savings remain unchanged, and he finds th...
Ali the barber shaved 38% of his customers and gave a haircut to 76% of his customers. He charged Rs. 12 for a shave and Rs. 9 for a haircut. If 25% of ...
If the length of a rectangle is increased by 10% and the area is unchanged , then its corresponding breadth must be decreased by?
...The population of a village increase at the rate of 10% during the first year and decreases at the rate of 20% during the second year. If it has 20240 i...
Two numbers are less than a third number by 20% and 24% respectively. Find the percent by which the second number is less than the first.
