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:
Supriya runs a marathon race in 50 minutes at an average speed of 48 km/hour. In order to set a national record, she needs to win the race in 40 minutes. Considering that her speed remains constant, at what minimum speed should she run to set the record
Which number should be multiplied by 5324 to make it a perfect square
What is the value of log (a + b)/c + log c/a when it is given that ‘b’ is four times the value of ‘a’
Simple interest on an amount at 4% per annum for 13 months is more than the simple interest on the same sum for 8 months at 6% per annum by Rs.40. What is the principal amount
7, 11 and 13 perfectly divide which of the following numbers
A research laboratory conducts various experiments. The probability of occurrence of an event in one trial of an experiment is 0.3. Three independent trials of an experiment are performed. Find the probability that the event happens at least once
Rahul played well in this season. His current batting average is 51. If he scores 78 runs in today’s match, his batting average will become 54. How many matches had he played in this season
If 764xy is divisible by 90, then what is the value of x+y
What is the least number by which 16,800 must be divided to get a number which is perfect square
When 40 is subtracted from 50% of a number, the result is 50% of 500. Find one-tenth of the number
A trend was observed in the growth of the population in Saya islands. The population tripled every month. Initially the population of the Saya Island was 100. What would be its population after 4 months
In a match awards are given to each of 11 members of the team and a trophy to the team. In all winning team gets 2.75 kg weight awards. If the weight of the match winning trophy is 1.275kg, what is the weight of the award given to each player
If Mohan is the brother of Rohan's grandmother, how is Rohan related to Mohan