An examinee has to answer 6 out of 10 questions which are divided into two groups each containing 5 questions. 3 questions from each
group are to be selected. If one question from each group is
compulsory, in how many ways can the selection be made?

The sum of the first eight terms of an arithmetic progression is 9m + 14. the fifth term of the06 progression is 2m - 6, where m is a constant. given that the first term of the progression is 26,find the value of the common difference, d and thevalue of m.

How can you find the mean absolute deviation (mad) for this set of data?

Yvaries directly as x. y =90 when x=6. find y when x=13