erage of last two 15. The average o...
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erage of last two 15. The average of five num e average of five numbers is 58. he average of first two numbers is 48.5 and the average of last i numbers is 53.5. Find the third number. (1) 94 (2) 86 (3) 74 (4) 68

11th - 12th Class
Maths
Solution
135
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15. (2) Third number = Sum of five numbers (Sum of first two numbers + Sum of last two numbers) [ begin{array}{l} =5 times 58-(2 times 48.5+2 times 53.5) =290-(97+107)=290-204=86 end{array} ]
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