Four letters are selected from the 10 letters of the word SHOPKEEPER. Find the number of different selections if the four letters include exactly one P. ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................
Exam No：9709_w20_qp_51 Year：2020 Question No：7(d)
Answer:
Scenarios:
$\begin{array}{ll}\text { P E E E } & { }^{5} \mathrm{C}_{0}=1 \\ \text { P E E } & { }^{5} \mathrm{C}_{1}=5 \\ \text { P E }- & { }^{5} \mathrm{C}_{2}=10 \\ \mathrm{P}_{---} & { }^{5} \mathrm{C}_{3}=10\end{array}$
Total $=26$
$\begin{array}{ll}\text { P E E E } & { }^{5} \mathrm{C}_{0}=1 \\ \text { P E E } & { }^{5} \mathrm{C}_{1}=5 \\ \text { P E }- & { }^{5} \mathrm{C}_{2}=10 \\ \mathrm{P}_{---} & { }^{5} \mathrm{C}_{3}=10\end{array}$
Total $=26$
Knowledge points:
5.2.1 understand the terms permutation and combination, and solve simple problems involving selections
Solution:
Download APP for more features
1. Tons of answers.
2. Smarter Al tools enhance your learning journey.
IOS
Download
Download
Android
Download
Download
Google Play
Download
Download