Question
The average of 6 numbers is 40. Later, two more numbers
are added whose average is 'x' . After this, the overall average becomes 20% more than before. What is the value of 'x'?Solution
ATQ,
Sum of 6 numbers = 6 × 40 = 240 New average after adding 2 numbers = 40 × 1.2 = 48 Total sum of 8 numbers = 8 × 48 = 384 Sum of new 2 numbers = 384 - 240 = 144 Average of 2 new numbers = 144 ÷ 2 = 72 So, value of x = 72
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