Five observations 3, 5, 7

MATHEMATICS · Single correct · A Level · Mathematics · Data presentation and interpretation · Data presentation and interpretation

Problem

Five observations 3, 5, 7, a, b have mean 6 and variance 4. If

a \le b

, identify the ordered pair (a, b). (a)

(7,8)

(b)

(6,9)

(c)

(5,10)

(d)

(3,12)