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How many different selections of 4 letters can be made of word TELEPHONE if
a)there are no Es?
b)there is exactly 1 E?
c)there are no restrictions? ​

 Apr 6, 2020
 #1
avatar+252 
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a) There are 7 letters, t, e, l, p, h, o, and n. We dn't want e so we have 6 letters. There are 15 ways to leave two letters out, so our answer is 15.

b) we now want 3 letters from the 6 letters. There are 20 ways to get it.

c) we want 4 letters from 7 letters. there ar 35 possibilities.

 Apr 6, 2020
 #2
avatar+116 
+1

C) :-) coolsmileycoolcoolcoolcoolcoolcool your wellcome

 Apr 6, 2020

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