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[3/7 of {21 * (33.33% of (27 + 3) ÷ 5) – 7} – 8] = _______?

/ Mathematics Mcqs, Simplification and Approximation / By
[3/7 of {21 * (33.33% of (27 + 3) ÷ 5) – 7} – 8] = _______?

A. 7
B. 10
C. 15
D. 49
Explanation:
[3/7 of {21 * (33.33% of (27 + 3) ÷ 5) – 7} – 8] = ?
= [3/7 of {21 * (1/3 * 30 ÷ 5) – 7} – 8] = ?
= 3/7 of [{21 * 2 – 7} – 8] = ? => {3/7 * 35 – 8} = ? => 7