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Average marks scored by 3 students in Physics is 70 and average marks scored by another two students in the physics is 45. If the ratio of average marks scored by 5 students in Physics to that in Chemistry is 4 : 5, then what is the average marks scored in Chemistry by all the five students?

Average marks scored by 3 students in Physics is 70 and average marks scored by another two students in the physics is 45. If the ratio of average marks scored by 5 students in Physics to that in Chemistry is 4 : 5, then what is the average marks scored in Chemistry by all the five students? Correct Answer 75

GIVEN:

Average marks scored by 3 students in Physics is 70.

Average marks scored by another two students in the physics is 45

FORMULA USED:

Average = Sum of numbers/Total numbers

CALCULATION:

Sum of marks scored by 3 students in Physics = 3 × 70 = 210

Sum of marks scored by another 2 students in Physics = 2 × 45 = 90

Average marks scored in Physics by 5 students = (210 + 90)/5 = 60

Average marks scored in Chemistry by 5 students = 60 × (5/4) = 75

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