random selection

Determine whether the events are mutually exclusive: The person selected at random is a Democrat The person selected at random is an Independent => Yes or No..

The average price of a computer is $750. If prices of computers are approximately normally distributed with a standard deviation of $75, then what is the probability that a randomly selected computer costs more than $1000? => 3.3% or 0.33% or 0.04% or 0.4%..

A consignment of 24 computers is rejected if at least one out of 3 computers randomly selected for checking is found to be defective. Find the probability that the consignment will be returned if there are actually 6 computers that are defective. => 102 253 or 2 133 or 151 253 o..

What is the probability of the cone being selected at random from the figures? => 1 5 or 1 7 or 1 10 or 1 12..

There are 10 pens and 15 pencils in a box. If a student selects two of them at random, then what is the probability of selecting a pen and then a pencil? => 7 12 or 1 2 or 1 4 or 11 12..

There are 10 pens and 12 pencils in a box. If a student selects two of them at random, then what is the probability of selecting a pen and then a pencil? => 20 77 or 157 308 or 137 231 or 214 231..

The life times (in weeks) of seven randomly selected bulbs are as recorded. Find midquartile range. 52, 63, 107, 96, 118, 74, 86 => 85 weeks or 22 weeks or 170 weeks or 86 weeks..

The average number of calories that a person consumes per day is 2000. Find the probability that a randomly selected person consumes more than 2500 calories per day assuming a standard deviation of 200. => 62% or 0.62 or 0.62% or 38%..

The cumulative frequency for the distribution of the distance (in miles) that 20 randomly selected runners ran during a week is given in the ogive. Find the interquartile range for the data by constructing a box plot. => 18.5, Figure 2 or 11.2, Figure 2 or 23.5, Figure 1 or 12, ..

In a committee there are 20 Republicans and 15 Democrats; 10 of the Republicans are females and 10 of the Democrats are males. If a member is selected at random, then find the probability that the selected member is a Democrat or a female. => one or 2 7 or 6 7 or 5 7 o..