By increasing 91 in the ratio 7 : 13, we get :
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Given:
Original number = 91
Increased ratio = 7 : 13
The original part is 7.
7 parts = 91
1 part = 91 ÷ 7 = 13
The increased value is 13 parts:
New value = 13 x 13 = 169
Hence, option 2 is the correct option.
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