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NCERT Mathematics Class 10 Exemplar Ch 3 Pair of Linear Equations in Two Variables Part 2
11. If , is the solution of the equations and , then the values of a and b are, respectively
(A) 3 and 5
(B) 5 and 3
(C) 3 and 1
(D) – 1 and – 3
Answer: C
12. Aruna has only Re 1 and Rs 2 coins with her. If the total number of coins that she has is 50 and the amount of money with her is Rs 75, then the number of Re 1 and Rs 2 coins are, respectively
(A) 35 and 15
(B) 35 and 20
(C) 15 and 35
(D) 25 and 25
Answer: D
13. The father՚s age is six times his son՚s age. Four years hence, the age of the father will be four times his son՚s age. The present ages, in years, of the son and the father are, respectively
(A) 4 and 24
(B) 5 and 30
(C) 6 and 36
(D) 3 and 24
Answer: C