A) 21
B) 45
C) 27
D) 24
Correct Answer: B
Solution :
[b]Number of girls | Number of boys | Number of groups going to picnic | Total number of dolls |
1 | 4 | \[^{3}{{C}_{1}}^{4}{{C}_{4}}\] | \[1{{(}^{3}}{{C}_{1}}^{4}{{C}_{4}})=3\] |
2 | 3 | \[^{3}{{C}_{2}}^{4}{{C}_{3}}\] | \[2{{(}^{3}}{{C}_{2}}^{4}{{C}_{3}})=24\] |
3 | 2 | \[^{3}{{C}_{3}}^{4}{{C}_{2}}\] | \[3{{(}^{3}}{{C}_{3}}^{4}{{C}_{2}})=18\] |
Total | 45 |
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