Permutations And Combinations Ques 42
- Total number of ways in which six ’ + ’ and four ’ - ’ signs can be arranged in a line such that no two ‘-‘signs occur together is… .
$(1988,2 M)$
Show Answer
Answer:
Correct Answer: 42.(35 ways)
Solution:
Formula:
- Since, six ’ + ’ signs are ++++++
$\therefore 4$ negative sign has seven places to be arranged in
$ \Rightarrow \quad{ }^{7} C _4 \text { ways }=35 \text { ways } $
BETA
