Certain numbers of children were playing a game of football. There was a trial taking place on the field. In this trial the probability that a goal is scored is 2/5. The probability that a gril hits a goal is 7/10 whereas the probability than a boy hits a goal is 1/5. What will be the probability that not only a goal is hit but it is also hit by a boy?

Which of the following number is not a prefect square?

What is the radius of the in-circle of the triangle whose sides measure 5 12 and 13 units?

A car averages 25 miles per gallon of gasoline when driven in the city and 40 miles per gallon when drives on...

Annie invested a certain sum of money in a bank that paid simple interest. The amount grew to Tk 240 at the en...

In how many ways can Annie, Bushra, Camelia, Don, Elina and Frazana be seated if Annie and Bushra cannot seate...

If the average of a and b is 45, and the average of b and c is 35, then (a-c)=?