Question

50 students in a
class room likes nepali history or both subjects. Out of them 20 like both
subjets. If the ratio of the numb of students who like Nepali and history
is 3:2, Using Venn diagram find:​

Answer 1

Answer:

n(M) = 3x

n(S)= 2x

n (M∩S) = 20

By using formula,

n(M∪S) = n(M) +n(S) - n(M∩S) or, 50=3x+2x-20

or, 50 = 5x-20 or, 5x=70

x=14

∴Number of students who like Mathematics = 3x = 3×14 = 42