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Question Paper from: SBI PO Prelims 2017

Out of 12 persons, 11 spend Rs.2000 monthly each. The twelfth person spends Rs.110 more than the average spending of the 12 people. How much money does the twelfth person spend?

. Rs.2200

Rs.2120

Rs.3300

Rs.1800

Rs.2010

Solution:

Chapter Name: Average

Total spending of 11 persons = 2000 $\times$ 11 = 22000

Let the spending of the 12_thperson be x

Then,

the average spending of the 12 persons = x - 110

(x - 110) = $\frac{22000 + x}{12}$

⇒ 12x - 1320 = 22000 + x ⇒ 11x = 23320

⇒ x = Rs 2120

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SBI PO Prelims 2017

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