Sam L.
asked • 05/10/21Which is an incorrect way of writing 10C3 ?
Which is an incorrect way of writing 10C3? Please explain why for each thank you.
A. 10P3 / 3!
B. 10P3 / 7!
C. 10! / 3!7!
More
1 Expert Answer
Dr Gulshan S. answered • 05/10/21
Tutor
4.9
(52)
Experienced Physics Tutor with a PhD
10C3 = 10*9*8/(1*2*3)= 120
Now check option C
10!/( 3! *7!)
= 10*9*8*7*6*5*4*3*2*1/ ( 3*2*1) (7*6*5*4*3*2*1)
= 10*9*8 /(3*2*1)= 10*3*4 = 120
Sam L.
Thank you, Could you show how b) wouldn't work as well? For a better understanding
Report
05/10/21
Still looking for help? Get the right answer, fast.
Ask a question for free
Get a free answer to a quick problem.
Most questions answered within 4 hours.
OR
Find an Online Tutor Now
Choose an expert and meet online. No packages or subscriptions, pay only for the time you need.
Dr Gulshan S.
B is the only one incorrect as it is !10 only Answer A is Equal to C 10P3/!7 = !10*!7/!7 = !7 A=C05/11/21