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Let no. of brother be X and no. of sister be Y. As Sohan says "I have as many sister as brothers" ⇒ (X - 1) = Y -----(1) (He himself be not counted) as Pooja says "Each of us sister has only half as many sister as brothers". ⇒ Y - 1 = 0.5 × X ----- (2) (She herself be not counted) Solving both equation, Rearranging (1) ⇒ X = Y + 1 --------- (3) Substituting (3) into (2) ⇒ Y - 1 = 0.5 × (Y + 1) -------- (4) Solving (4) ⇒ 2Y - 2 = Y + 1 ⇒ Y = 3 Substituting Y = 3 into (3) We get: X = 3 + 1 = 4 Therefore, answer is 3 Sister and 4 brother Hence, the correct answer is "4 brothers and 3 sister".
If log 32 = 3.816, then the value of log 16 is:
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