The average of 8 numbers is 30. Out of those 8 numbers, the average of first 2 numbers is 26 and that…
The eight numbers total \(8\times30=240\), of which the first two give 52 and the next three give 84, leaving 104 for the last three. Writing the sixth as \(x\), the seventh…
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The average of 8 numbers is 30. Out of those 8 numbers, the average of first 2 numbers is 26 and that of next three numbers is 28. The sixth number is less than seventh (7th) by 3 and less than eighth by 5. Find the eighth number.
Answer and explanation
Correct answer A
The eight numbers total , of which the first two give 52 and the next three give 84, leaving 104 for the last three. Writing the sixth as , the seventh is and the eighth , so and . The eighth number is .
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