lycheeeee

3 Questions
1 Answers

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405

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+14

halp

Our club has 10 members, and we need to appoint a president, a vice-president, and a secretary. How many ways can we do this if: (a) Each member can hold at most one office? (b) members can hold any number of offices?

lycheeeee May 22, 2021

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783

1

+14

A science teacher is arranging her books on a shelf. She has 4 Astronomy books, 3 Biology books, and 2 Chemistry books. How many ways can sh

A science teacher is arranging her books on a shelf. She has 4 Astronomy books, 3 Biology books, and 2 Chemistry books. How many ways can she arrange these books on the shelf if the books from each subject must be together?

help read more ..

lycheeeee May 22, 2021

0

536

1

+14

Of the 30 students in my class, 11 practice taekwondo, 11 play piano, and 20 take lessons in math. 4 students play piano and go to math, 3 s

Of the 30 students in my class, 11 practice taekwondo, 11 play piano, and 20 take lessons in math. 4 students play piano and go to math, 3 students do taekwondo and play piano, 5 students go to math and practice taekwondo, and 3 students do none of these. read more ..

lycheeeee May 22, 2021

+14

0

real solutions would be x=5, x=15. complex solutions would be x=10-5i, x=10+5i

lycheeeeeMay 22, 2021