The average score in Mathematics of 90 students of section A and B of…

Question

The average score in Mathematics of 90 students of section A and B of class IX was 63. The number of student in A were 10 more that those in B. The average score of student in A was 30% more than that of students in B.…

Accepted Answer

Option D. 54. Answer & Solution Answer: Option D Solution: & Students in A = 50 & Students in B = 40 & Total students:A:B = 9:5:4 & Average of A Average of B = 13x10x & 9 × 63 = 13x × 5 + 10x × 4 & 567 = 65x + 40x & 105x = 567 & x = 567105 & x = 8115 & x = 275 & Average of B = 10x & = 10 × 27…

The average score in Mathematics of 90 students of section A and B of class IX was 63. The number of student in A were 10 more that those in B. The average score of student in A was 30% more than that of students in B. The average score of students in B is:

Solution