Let the quantity of each alloy be 1 unit. For the first alloy, copper = 3/5 and zinc = 2/5 For the second alloy, copper = 5/8 and zinc = 3/8 Now, in the new alloy, copper = (1 × 3/5 + 1 × 5/8) / 2 = (24 + 25) / 40 = 49/40 Zinc = (1 × 2/5 + 1 × 3/8) / 2 = (16 + 15) / 40 = 31/40 The ratio of copper to zinc in the new alloy = 49:31 Correct answer: d
Select the number from the given option that can replace the question mark (?) in the following series:
32, 16, 24, 60, ?, 945
Find the missing numbers.
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Select the number from the given option that can replace the question mark [?] in the following series.
515, 517, 520, 525, 532, 543, 556, ?
Find the missing term?
Find the missing number from the given responses.
Find the missing number.
Select the number which can be placed in the column of question mark sign.
Study the given pattern carefully and select the number that can replace the question mark (?) in it.
Find the missing number by analysing the pattern followed by the numbers in each row.
Find the missing term in the following series:
43 44 ? 69 185
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