In a class of 200 students, 60% read physics, 50% read biology and 30%

1.	In a class of 200 students, 60% read physics, 50% read biology and 30% read both. Find the number of students who read neither physics nor biology ?
Answer» use formula:total- neither= A+ B - bothtotal= 200physics (A)= 120biology (B)= 100both= 60 put the values in above formula 200- neither= 120 +100 - 60neither= 40 therefore 40 students neither read physics nor biology 40 is the correct answer of the given question

In a class of 200 students, 60% read physics, 50% read biology and 30% read both. Find the number of students who read neither physics nor biology ?

Answer»

use formula:total- neither= A+ B - bothtotal= 200physics (A)= 120biology (B)= 100both= 60 put the values in above formula

200- neither= 120 +100 - 60neither= 40

therefore 40 students neither read physics nor biology

40 is the correct answer of the given question