Problem 37P

A sound wave in air has a frequency of 262 Hz and travels with a speed of 343 m/s. How far apart are the wave crests (compressions)?

Step 1 Here, we have to find out the probability of 3 balls labelled A, B and C to be placed in box 1. First, we should draw all the possible combination of the balls A, B and C either in box 1 and 2. We have to focus only on the balls A, B and C and we can take either 3 balls as random for labelling A, B and C.