Join WhatsApp Icon CAT WhatsApp Group
Question 57

In class IX, the average of marks in science for six students was 48. After result declared, it was found in case of one student, the marks 45 were misread as 54. The correct average is :

In class IX, the average of marks in science for six students was 48. After result declared, it was found in case of one student, the marks 45 were misread as 54. 

Average marks $$ = \frac{48\times6-54+45}{6}$$
$$=\frac{279}{6}$$
$$=46.50$$

Option B is correct.

Create a FREE account and get:

  • Free SSC Study Material - 18000 Questions
  • 230+ SSC previous papers with solutions PDF
  • 100+ SSC Online Tests for Free