Question
The average marks obtained by 120 cndidates in a certain examinationis 35.if the average marks of passed candidate is 39 and that of the failed candidates is 15,what is the number of candidates who passed the examination
Solution
Ans.D
Let No. of passed candidates are x
So, x * 39 + (120 – x) 15= 120 * 35
x = 100
Ans.D
Let No. of passed candidates are x
So, x * 39 + (120 – x) 15= 120 * 35
x = 100