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Question 23

In computing the mean of 8 numbers, a boy mistakenly used 17 instead of 25 as one of the numbers and obtained 20 as the mean. Find the correct mean

  • A.19
  • B.21
  • C.23
  • D.24
Objective

Question details

Exam body
WAEC
Subject
Further Mathematics
Year
2012
Question no.
#23
Type
Objective
Previous · Q22Find the unit vector in the direction of the vector \(-12i + 5j\). Next · Q24 Given that \(^{n}P_{r} = 90\) and \(^{n}C_{r} = 15\), find the value of r.

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