Question
The average of two numbers ‘M’ and ‘N’ is 250
such that they are in the ratio 2:3 respectively. Another number ‘O’ is 120 more than ‘N’ and fourth number ‘P’ is 20% of the ‘M’. Find the average of ‘O’ and ‘P’.Solution
Sum of ‘M’ and ‘N’ = 250 × 2 = 500
Therefore,
‘M’ = 500 × (2/5) = 200
‘N’ = 500 – 200 = 300
‘O’ = 300 + 120 = 420
‘P’ = 0.2 × 200 = 40
Required average = {(420 + 40)/2} = 230
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