Question

In a class of 25 students, there are 17 cyclists, 13 swimmers and 8 weightlifters and no one is all the three. In a certain mathematics examination ( having grades a, b, c, d,

e. 6 students got grades d or

e. If the cyclists, swimmers and weightlifters all got grade b or c, determine the number of students who got grade

a.

Answer 1

hey mate the total no of students is wrong what u have written
so let the total no of student be x

cyclist b,c grade 17

swimmers. b,c. grade 13

weightlifters. b or c grade 8

other. d or e grade6

other. a grade y

so adding all these
x=17+13+8+6+y
x=44+y
put the value of x the whole class strength and u will get y the answer