Q. given below are the marks obtained by 50 students appearing for an admission test :
marks no. of students
0-10 6
10-20. 8
20-30 20
30-40. 9
40-50. 7
if the cut off point was 34 find the percentage of students scoring more than 34 marks.

11 mintues is the naswer

First step is to get rid of the square root. remember that a square root is the same as raising to the (1/2) power. see below: multiply exponents per exponent rules to get: remember you subtract exponents from the denominator and add exponents in the numerator so: simplify further: so a is the correct choice. if you don't understand this google exponent rules and it will you understand. look at the image results.