Answers>Maths>IB>Article

3 girls and 4 boys are seated randomly on a bench. Find the probability that the girls set together and the boys sit together.

The number off total arrangements is 7!(permutation). The number of ways for which the girls and boys sit togehter is 3!4!2. The probability is the division of the number of way by the total possibilities, which gives 2/35. To make less calculations remmeber the fact that the factorial (!) is equal to the multiplication of every number from the starting point to 1, so 4! = 432*1.

Answered by Lina L. Maths tutor

1948 Views

See similar Maths IB tutors

Related Maths IB answers

All answers ▸

Given that y = -16x2​​​​​​​ + 160x - 256, find the value of x giving the maximum value of y, and hence give this maximum value of y.


Find the coordinates that correspond to the maximum point of the following equation: y = −16x^2 + 160x - 256


The velocity, v, of a moving body at time t is given by v = 50 - 10t. A) Find its acceleration. B) The initial displacement, s, is 40 meters. Find an expression for s in terms of t.


Three girls and four boys are seated randomly on a straight bench. What is the probability that the boys sit together and the girls sit together.


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo
Cookie Preferences