IndigoLearn

Forums

All Topics Accountancy Auditing Corporate & Other Laws Direct Taxation Indirect Taxation Financial Management Economics Costing Strategic Management Maths & Stats Exams Others AFM Financial Reporting CFA Level I

Permutations and Combinations

Maths & Stats

Anyone Pls give written solution for this Sum

Screenshot_2023-05-22-16-07-24-175_org.telegram.messenger.jpg

Sr the Unique

Sr the Unique

CA Inter

★ 10

22-May-23 20:46

215

Answers (4)

Answer will be b) 6. Divide nCr-1 by nCr ( i.e., nCr-1/nCr = 56/28). Put in the formulas and you will get an equation 3r = 2n+2 Then divide nCr by nCr+1 (i.e., nCr/nCr+1 = 28/8). Put in the formulas and you will get an equation 9r = 7n - 2. Now solve these two equations & we will get r = 6.

Sahibdeep Singh

Sahibdeep Singh

CA Inter

★ 14K+

24-May-23 11:36

Sahibdeep Singh

Answer will be b) 6. Divide nCr-1 by nCr ( i.e., nCr-1/nCr = 56/28). Put in the formulas and you will get an equation 3r = 2n+2 Then divide nCr by nCr+1 (i.e., nCr/nCr+1 = 28/8). Put in the formulas and you will get an equation 9r = 7n - 2. Now solve these two equations & we will get r = 6.

Thank you sir🙏

Thread Starter

Sr the Unique

Sr the Unique

CA Inter

★ 10

24-May-23 20:00

In which formula

Lathika

Lathika

CA Foundation

★ 6K+

25-May-23 11:22

Lathika

In which formula

Formulas for nCr, nCr+1, nCr-1 - figures will cancel out then

Sahibdeep Singh

Sahibdeep Singh

CA Inter

★ 14K+

25-May-23 11:51

2 day Offer

Instagram

Youtube

Connect With Us

Sales

964-011-1110 / 913-331-0549

Support

support@indigolearn.com

Company

About Us

Contact Us

Careers

Information

Testimonials

FAQ

Terms & Conditions

Privacy Policy

CIN: U74999TG2017PTC116012 | GSTIN: 36AAECI4332C1Z0 | PAN: AAECI4332C