Question

a student has three books on computer three books on economics and five books of commerce if these books are to be arranged subject wise then these can be placed number of ways​

Answer 1

Answer:

Can't understand your question?

Do you want it to place in different order then your answer is

First order

• Computer
• Economics
• Commerce

Second way be like that

• Computer
• Commerce
• Economics

Third way

• Economics
• Commerce
• Computer

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Answer 2

Answer:

hence arrangements for 3 computer books = 3P3

for an economics book. = 3P3

for commerce book =5P5

and there are 3 subjects which have to be arrange = 3!

so tha arrangements= 3!x3!x3!x5!

=25920