1. In how many different ways can the letters of the word “PRINCIPAL” be arranged?
a) 90720
b) 181440
c) 362880
d) 45360
e) 22680
2. A person invested an amount for 7 years at a simple interest rate of 7% p.a. He got an amount of Rs 27863 at the end of seven years. What is the principal amount he invested?
a) Rs 18300
b) Rs 18700
c) Rs 18900
d) Rs 19300
e) Rs 19600
3.
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