Q. 21

# Mark the correct alternative in the following:If , then the value of r isA. 12B. 8C. 6D. 10E. 14

r – 6 + 3r + 1 = 43 ( nCx = nCy n = x + y or x = y )

4r – 5 = 43

4r = 48

r = 12

Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Related Videos
Challenging Quiz on P&C | Test Yourself55 mins
Permutations & Combinations | Analyze your learningFREE Class
Lecture on Combinations49 mins
Understand Permutations like never before60 mins
Check Your progress Part 2| Interactive Quiz: Permutation & CombinationFREE Class
Interactive Quiz on Division and distribution of objects17 mins
Combinations - BOX & GAP Method38 mins
Interactive Quiz on Combinations50 mins
Division and distribution of objects58 mins
Interactive Quiz on Combinations-0253 mins
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
view all courses