If sum of two number is 27 and their HCF and LCM are 3and 60 respectively then sum of reciprocal
A phone company offers 5 phone plan options: call waiting, call forwarding, voice mail, conferencing, and caller ID. A customer can choose 3 options. The number of ways one can avail the plan options is:
For irrigational purposes, a farmer uses a tank of water. He uses a pipe during night to fill the tank, so that he could use the tank of water in the morning to irrigate his farm. The pipe fills the tank in 3 hours but on the particular day,because of a leak in the tank, the pipe takes 4.5 hours to fill it. In how many hours can the tank be completely emptied by the leak alone
A man earns 24,000 per month. He spends one-third of his income on personal expenditure. Half of the remaining income is invested in a scheme for 15% interest per annum. After investing half of the remaining income is invested in a scheme which gives 10% income per annum. The remaining lies in a bank where it earns an interest of 4% per annum. The effective rate of interest earned by the man on his investments by the end of the year is
The sum of squares of 3 numbers is 170, while the sum of their products taken two at a time is 157.What is the sum of the numbers
A group of 4 students is to be chosen from 3 boys and 5 girls.Find the probability that the group contains exactly 3 girls
Five students have not been absent for the entire first semester. They are asked to draw one pass each from a bag that has 5 movie passes and 5 meal passes. Parul and Mini are the first two students to draw the pass simultaneously. What is the probability that they both draw movie passes
In a class of 50 students, the average age of girls is 12.3 years and that of boys is 12.5yearas. if the average age of the class is 12.42years, then the number of boys and girls respectively in the class are:
Swapan has kept RS. 2000 at 15 % simple interest in a bank for two years. If she had kept the same amount at compound interest for two years. How much extra she would have earned
8 friends A, B, C, D, E, F, G, H are to be seated around a round table. Find the probability that A and B never sit next to each other
A home security system provides a security codes for a door, which consist of five buttons. Code may be generated by pressing any one button, any two, any three, any four, or all five buttons. How many such codes are possible
Select the right option from the given alternatives. A17R : D12P :: G7N :
what is next in the number series 9, 54, 135, 252
A child while coming home from his school first goes 4 kms towards south-east, then 8 kms toward west. He then goes 4 kms towards north-west. In which direction is he from his school
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