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Answered

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In how many ways can Anna arrange 2 math books, 3 physics books, and 5 chemistry books on her shelf if all books of the same subject must be adjacent? (The books are distinguishable.)
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Sagot :

mhanifa

Answer:

  • 8640 ways

Step-by-step explanation:

Arranging the books of each subject:

Math:

  • Combination of 2 books → 2! = 2

Physics:

  • Combination of 3 books → 3! = 6

Chemistry:

  • Combination of 5 books → 5! = 120

We also need to consider the subjects.

There are 3 subjects, kept separately, they will be arranged in 3! = 6 ways

So the total number of combinations is:

  • 2*6*120*6 = 8640
manissaha129

Answer:

  • 2 maths books can be arranged as (2!=2) ways
  • 3 physics books can be arranged as (3!=6) ways
  • 5 chemistry books can be arranged as (5!=120) ways
  • Books can be arranged in suject-wise in (3!=6) ways

Hence, total ways are (2×6×120×6) ways =8640 ways.

8640 is the right answer.

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