If the mean of numbers 28, x, 42, 78 and 104 is 62, what is the mean of 48, 62, 98, 124 and x?

Total students not enrolled in either course = Total students - (Students taking French + Students taking German - Students taking both)

Total students = 78

Students taking French = 41

Students taking German = 22

Students taking both = 9

Total students not enrolled in either course = 78 - (41 + 22 - 9) = 16 students.

Say is the original price of an orange and n is the number of orange can buy at 12 tk, then:

;
and

New price 0.6x and new orange quantity n+4

Then,
--> --> --> --> .

So, for 24tk, 24/2=12 oranges can be purchased at the original price of 2tk