A person writes letters to six …
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Posted by Nancy Rajput 6 years, 11 months ago
- 3 answers
Gaurav Seth 6 years, 11 months ago
a) The number of ways in which at least two of them are in the wrong envelopes
</header>
=15+40+135+264+265
=719
b) The number of ways in which all letters be placed in the wrong envelopes
= 6! (
)
=720
=720(
)
=360-120+30-6+1
=265
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Nancy Rajput 6 years, 11 months ago
0Thank You