Two thirds of the students in a class are boys and the rest girls. It is known that the probability of a girl getting a first class is 0.25 and that of a boy getting a first class is 0.28. find the probability that a student chosen at random will get first class marks in the subject.

Explanation

To find the probability that a student chosen at random will get first class marks in the subject, we can follow these steps:

### Step 1: Determine the proportions of boys and girls in the class.
Given that two-thirds of the students are boys, we can conclude that:
- Proportion of boys = \( \frac{2}{3} \)
- Proportion of girls = \( 1 - \frac{2}{3} = \frac{1}{3} \)

### Step 2: Identify the probabilities of boys and girls getting first class marks.
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