Calculate the product of 1/3 and 1/4

The random variable x is the number of occurrences of an event over an interval of ten minutes. it can be assumed that the probability of an occurrence is the same in any two-time periods of an equal length. it is known that the mean number of occurrences in ten minutes is 5.3. the appropriate probability distribution for the random variable

At a sale this week, a desk is being sold for $213. this is a 29% discount from the original price. what is the original price?

Which shows the correct substitution of the values a,b and c from the equation 1=-2x+3x^2+1