2, 1
1, 2
1, 5
5, 2
Correct answer is C
Mean ˉx = ∑fx∑f
= 5.21
= 8+4y+36+404+y+6+5
= 5.21
= 84+4y15+y
= 5.2(15 + y)
= 84 + 4y
= 5.2 x 15 + 5.2y
= 84 + 4y
= 78 + 5.2y
= 84 = 4y
= 5.2y - 4y
= 84 - 78
1.2y = 6
y = 61.2
= 6012
= 5
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