Average marks of X, Y and Z is 90. Marks of X and Z are 86 and 68 respectively. What are the total marks of Y and Z?
Show answer & explanation
Correct answer: C
Explanation
Given:
Average of X + Y + Z = 90
X = 86, Z = 68
According to the formula:
Sum = Average × Number
X + Y + Z = 90 × 3 = 270
86 + Y + 68 = 270
Y + 154 = 270
Y = 116
Now,
Y + Z = 116 + 68 = 184