Circular metal tokens are used to operate a washing machine in a laundromat. The diameters of the tokens are known to be normally distributed. Only tokens with diameters between 1.94 cm and 2.06 cm will operate the machine.
Find the probability that less than two tokens out of 20 will not operate the machine.
Do I use binomial distribution for this? Because it only has two outcomes and its probability is independent of each other.
