MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

nCr Definitions and Properties

If ^56P_r+6:^...

Question

If $^{56} P_{r + 6} :^{54} P_{r + 3}$ = 30800:1, then r =

A

31

No worries! We‘ve got your back. Try BYJU‘S free classes today!

B

41

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

C

51

No worries! We‘ve got your back. Try BYJU‘S free classes today!

D

40

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is B
41

$\frac{56!}{(50 - r)!} \times \frac{(51 - r)!}{54!}$

= $\frac{30800}{1} \Rightarrow 56 \times 55 \times (51 - r)$ = $30800 \Rightarrow r$ = 41

Suggest Corrections

thumbs-up

0

Similar questions

^{56} P_{r + 6} :^{54} P_{r + 3} = 30800 : 1

r

=

^{56} P_{r + 6} :^{54} P_{r + 3} = 30800 : 1

r

.

^{56} P_{r + 6} :^{54} P_{r + 3} = 30800 : 1

^{r} P_{2}

If $^{56} P_{r + 6} :^{54} P_{r + 3} = 30800 : 1$ , then r = 41

^{56} P_{r + 6} :^{54} P_{r + 3} = 30800 : 1

^{r} P_{2} =

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

What Is Soil?

MATHEMATICS

Watch in App

explore_more_icon

Explore more

nCr Definitions and Properties

Standard VII Mathematics

Join BYJU'S Learning Program

CrossIcon