Question
A box contains red and blue marbles. What is the ratio
of red marbles to blue marbles in the box? Statements I: Â The number of red marbles is 40% of the total number of marbles in the box. Statements II: Â There are 30 more blue marbles than red marbles. In each of the following questions, two statements or three statements are given. You are expected to solve them and determine which statement or combination of statements is sufficient to answer the question.Solution
Let r = red marbles, b = blue marbles. Statement I: r = 0.4(r+b) Solve: 0.6r = 0.4b = r/b = 2/3 Ratio found. Sufficient. Statement II: b = r+30 No fixed ratio (depends on value of r). = Not sufficient. Therefore, Only Statement I is sufficient. Hence, Statement I alone is sufficient, Statement II alone is not.
42, 54, 78, 114, 168, 222
What will be come in place of (?) in the given number series.
2, 6, 18, 54, ?, 486The median of the following distribution is:
The ratio of Pawan's income to Qureshi's income is 6:5. Pawan spends 75% of his income, while Qureshi saves 24% of his income. What percentage of Pawan'...
142.07 + 21.89 – (128.12 ÷ 7.81 – 12.09 × 6.98) = ?
A line with slope m touches the parabola y ² = 4ax. The equation of the tangent is:
A man spends 35% of his income on food, 25% on rent, and the remaining amount on other expenses. If he saves ₹9,000, which is 20% of his income, find ...
A man invests ₹20,000 in a scheme that offers a 10% simple interest per annum. After how many years will his total amount become ₹30,000?
24, 13, ?, 29, 117, 937
If cos A = 4/5 and A is an acute angle, find the value of 3 tan A + 4 sec A.
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