A jar contains only red and blue marbles in a ratio of 9:5. If there are 20 blue marbles, how many red marbles are there?

Correct answer

B. 36

Explanation

The ratio 9:5 means for every 5 blue marbles there are 9 red. 20 blue ÷ 5 = 4 groups, so red marbles = 9 × 4 = 36.

Related MCQs

• If x + y = 12 and x - y = 4; what is the value of x?
• A data set has a mean of 20 and consists of 5 numbers. If four of the numbers are 15; 18; 22; and 25; what is...
• Despite the ___ evidence presented; the jury remained unconvinced of the defendant's guilt.
• If a rectangular garden has an area of 96 square feet and a width of 8 feet; what is its length?
• If the ratio of boys to girls in a class is 3:5 and there are 24 students total; how many girls are there?
• The politician's speech was intentionally ___; avoiding any clear commitment on the controversial issue.