Final answer:
The marginal relative frequency cannot be determined without the number of boys and girls who want to be a teacher given.
Step-by-step explanation:
The question is asking for the marginal relative frequency of boys and girls who want to be a teacher. Marginal relative frequency is the proportion of a certain category out of the total. To find the marginal relative frequency, we need to know the number of boys and girls who want to be a teacher.
Since the question does not provide any information about the number of boys and girls who want to be a teacher, we cannot determine the marginal relative frequency. Therefore, we cannot choose any of the given options (a. 6%, b. 12%, c. 24%, d. 48%) as the correct answer.