Permutation-Combination

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In how many ways can the alphabets of the word 'ELEPHANTS' be arranged such that the vowels retain their positions?
10080
no
5040
no
2520
yes
11880
no
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A person X has four notes of Rupee 1, 2, 5 and 10 denominator. The number of different sums of money she can form from them is…….
16
no
15
yes
12
no
8
no
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A question paper had ten questions. Each question could only be answered as True(T) or False(F). Each candidate answered all the questions. Yet, no two candidates wrote the answers in an identical sequence. How many different sequences of answers are possible?
20
no
40
no
512
no
1024
yes
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