A batsman in his 12th innings makes a score of 120, and thereby increase his average by 5. The average score after 12th innings is
Let the initial average = $$x$$
=> Runs scored in first 11 innings = $$11x$$
Score in 12th innings = 120
According to ques, new average
=> $$\frac{11x+120}{12}=(x+5)$$
=> $$11x+120=12x+60$$
=> $$12x-11x=120-60$$
=> $$x=60$$
$$\therefore$$ Average score after 12th innings = $$60+5=65$$
=> Ans - (C)
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