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junior college 1 | H1 Maths
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Audrey
Audrey

junior college 1 chevron_right H1 Maths chevron_right Singapore

I have gotten the answers and I am not sure if they are correct. Need your help to check if they are correct. If it is not correct, what is wrong. Thanks.

(i) 12! = 479001600

(ii) 8C5 * 5! * 7! = 33 868 800

(iii) 7!*5!*2! = 1 209 600

(iv) 5C4 / 12 C5 = 5/792

Date Posted: 2 years ago
Views: 563
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Boy Mow Chau
Boy Mow Chau
2 years ago
Should be all correct except (iv).

(iv) should be ...
5C4 * 7C1 / 12C5 = 35/792
Audrey
Audrey
2 years ago
Thank you

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Jiahao
Jiahao's answer
7 answers (Tutor Details)
1st
Hi Audrey, everything looks okay, except the last part. You would have to include the 7C1 because there is still one more slot for the last owner, and you can choose among (12-5 food stalls) other stalls.