If the average of 20, 40, 50, Y and Z is 45 , then what is the average of Y and Z ?
Answer & explanation
Correct answer: option 2
Total sum of 5 numbers = 5 × 45 = 225
ATQ ,
20 + 40 + 50 + Y + Z = 225
Y + Z = 115
Average of Y & Z = \(\frac{115}{2}\) = 57.5