there are 15 boys and 10 girls in a class. 3 studenta selected at rendom. what is the probability of being 1 girl and 2 boys out of selected students?
Answers
Answered by
0
21/46
Step-by-step explanation:
15 boys and 10 girls out of which 3 students are selected.
possibilities are as follows
3 boys and zero girls - 15C3 * 10C0
2 boys and 1 girl - 15C2 *10C1
1 boy and 2 girls - 15C1 * 10C2
0 boys and 3 girls - 15C0 * 10C3
Total probability is obtained by adding above values which is 2300
Favourable probability is 15C1*10C2 which is 1050.
Probability required is 1050/2300 =21/46.
Similar questions