a math quiz consist of 30 questions. the first 20 questions are worth 4 points each. the last 10 questions are worth 7 points ea
ch. no points will be deducted for each wrong answer. Justin scores 124 points on a math quiz. how many of the first 20 questions and how many of the last 10 questions does he answer correctly?
2 answers:
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Given:
Total number of girls in her class = 16
Total number of boys in her class = 14
To find:
The number of different ways of choosing one girl and one boy.
Solution:
We have,
Total number of girls = 16
Total number of boys = 14
So,
Total number of ways to select one girl from 16 girls = 16
Total number of ways to select one boy from 14 boys = 14
Now, number of different ways of choosing one girl and one boy is
Therefore, the required number of different ways is 224.