A photographer wishes to arrange 7 children consisting of 3 boys and 4 girls in a straight line for a phot taking session. Find the number of ways that he can arrange if (a) all girls are separated, (b) 3 boys occupy the 3 middle positions

A photographer wishes to arrange 7 children consisting of 3 boys and 4 girls in a straight line for a phot taking session. Find the number of ways that he can arrange if (a) all girls are separated, (b) 3 boys occupy the 3 middle positions

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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A photographer wishes to arrange 7 children consisting of 3 boys and 4 girls in a straight
line for a phot taking session. Find the number of ways that he can arrange if
(a) all girls are separated,
(b) 3 boys occupy the 3 middle positions.

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