The Average Of 20 Numbers Is 15 And The Average Of First Five Is 12.

1.	The Average Of 20 Numbers Is 15 And The Average Of First Five Is 12. The Average Of The Rest Is ?
Answer» If the AVERAGE of remaining numbers be x, then 20 × 15 = 5 × 12 + 15x ⇒ 300 = 60 + 15x ⇒ 15x = 300 – 60 = 240 => x = 240/15 = 16 If the average of remaining numbers be x, then 20 × 15 = 5 × 12 + 15x ⇒ 300 = 60 + 15x ⇒ 15x = 300 – 60 = 240 => x = 240/15 = 16

The Average Of 20 Numbers Is 15 And The Average Of First Five Is 12. The Average Of The Rest Is ?

Answer»

If the AVERAGE of remaining numbers be x, then

20 × 15 = 5 × 12 + 15x

⇒ 300 = 60 + 15x

⇒ 15x = 300 – 60 = 240

=> x = 240/15 = 16

If the average of remaining numbers be x, then

20 × 15 = 5 × 12 + 15x

⇒ 300 = 60 + 15x

⇒ 15x = 300 – 60 = 240

=> x = 240/15 = 16

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The Average Of 20 Numbers Is 15 And The Average Of First Five Is 12. The Average Of The Rest Is ?

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