Question

in the class there are 50 students out of which 40 study mathematics and 20 study physics.find the no of studends who study both mathematics and physics.​

Answer 1

Answer:

this is the answer

Step-by-step explanation:

have a nice day

may be this is another method

Answer 2

Answer:

n(U)=50

n(A)=40

n(B)=20

n(U)=n(A)+n(B)-n(A intersection B)

50=40+20-n(A intersection B)

n(A intersection B)=60-50

there for no of students studying both are 10