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Question

Q. For the arrangements of the letters of the word ‘RATNA’, how many words would start with the letter R?

Q. ’RATNA’ शब्द के अक्षरों के विन्यास के लिए, R अक्षर से कितने शब्द शुरू होंगे?


A

24
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B

12
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C

60
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D

120
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Solution

The correct option is B
12

We need to count words starting with R. These words would be represented by R _ _ _ _ .

The letters A,T,N,A can be arranged in 4!2! Ways in the 4 places. ie. 12 ways.


हमें R से शुरू होने वाले शब्दों को गिनना होगा। इन शब्दों को R _ _ _ _ द्वारा निरूपित किया जाएगा।

A,T,N,A अक्षरों को 4!2! तरीकों से 4 स्थानों पर व्यवस्थित किया जा सकता है, अर्थात 12 तरीके।


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