Question
In a class, the ratio of number of boys to number of
girls is 13:9. If 2 boys joined the class and 6 girls left the class, then the ratio becomes 5:3. Find the actual number of girls in the class.Solution
Let initially the number of boys and girls be 13x and 9x, respectively.
(13x + 2) : (9x − 6) = 5 : 3
Or, 3(13x + 2) = 5(9x − 6)
Or, 39x + 6 = 45x − 30
Or, 6x = 36 ⇒ x = 6
Therefore, number of girls = 9 × 6 = 54
The type of germination observed in pigeon pea?
Which of the following activities are encompassed under the term “harvesting” in agricultural practices?
The tree which is known for its scarlet red flowers and is commonly used as an ornamental tree for shade and hedges due to its spines
What are the genes responsible for dwarfness in wheat ?
Which law states that the profit from a limited amount of variable input is maximized when that input is used in such a way that marginal return from th...
The function of IMF includes: (i) Granting reconstruction loans to the war-devastated country (ii) Provides financial assistance to the member nations (...
Karl fisher reagent is used in the estimation of ____
Among common insect monitoring tools, which of the following would be considered an unbiased sampling strategy for population estimates?
Manuring in mature tea is done on the basis of which of the following?
The colour of beetroot is attributed to which of the following compound?
Relevant for Exams:
