1.

The average of (33, 45, 65 and 80) and (21, 9, 11 and 50) is X and Y respectively. Find the value of 2(X + Y)1). 542). 78.53). 1574). 153

Answer»

Average = (sum of ELEMENTS)/(number of elements)

GIVEN,

The average of (33, 45, 65 and 80) and (21, 9, 11 and 50) is X and Y respectively

⇒ X = (33 + 45 + 65 + 80)/4

⇒ X = 223/4

⇒ X = 55.75

⇒ Y = (21 + 9 + 11 + 50)/4

⇒ Y = 91/4

⇒ Y = 22.75

The value of 2(X + Y)

= 2(55.75 + 22.75)

= 2(78.5)

= 157

∴ The value of 2(X + Y) is 157.


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