Final answer:
The number of boys in an introductory chinese course with 378 students and a boy to girl ratio of 5:4 is 210. he answer is found by dividing the total number of students by the sum of the parts in the ratio and then multiplying by the parts for the boys.
Step-by-step explanation:
To find out how many boys are in an introductory chinese course with 378 students, where the ratio of boys to girls is 5:4, we first need to determine the total parts that make up the whole class. in this case, 5 parts represent boys and 4 parts represent girls, making a total of 9 parts. we then divide the total number of students by the total number of parts to find out the number of students that represent each part.
- Total number of parts = 5 (boys) + 4 (girls) = 9 parts
- Number of students per part = 378 students ÷ 9 parts = 42 students per part
- Number of boys = 5 parts × 42 students per part = 210 boys
Therefore, the number of boys in the Chinese course is 210, which is not an option listed in the question. it seems there might be a mistake in the provided options or perhaps in the question itself. however, based on the calculations using the given ratio, the correct answer would be 210 boys.