Probability - practice problems - page 8 of 27
Number of problems found: 536
- The following
The following data represents the number of cases of coffee or filters sold by four sales reps in a recent sales competition. Sales Person; Gourmet; Single Cup; Filters; Total Connor; 142; 325; 30; 497 Paige ; 42; 125; 40; 207 Bryce ; 9; 100; 10; 119 Mall - Prisoners
It is estimated that 10% of all federal prisoners have a positive self-image, 40% have a neutral self-image, and the rest have a negative self-image. The estimated probability of rehabilitating a prisoner with a negative self-image is 0.1. With a neutral - Random variable distribution The distribution of the random variable X is given in the following table. Calculate P[X is odd], E[X] and P[1<X≤6] Probability distribution table: xi; 1; 2; 3 ; 4; 5; 6; 7; 8; 9 pi; 0.30; 0.12; 0.18; 0.10; 0.07; 0.07; 0.06; 0.05; 0.05
- Probability - dice
I roll six six-sided dice; what is the probability that exactly three threes will fall? - Dice conditional probability
I roll a 7-wall dice. What is the conditional probability that three fell if an odd number fell? - Dice unit probability
We roll two dice. One is 6-walled, and the other is 8-walled. What is the probability that at least one unit will fall? - How many 23
How many times should a dice be rolled to obtain a most likely number of 2 points on it to be equal to 32? - Suppose 6
Suppose the life span of a revolutionary light bulb is normally distributed with a mean life span of 70 thousand hours and a standard deviation of 3 thousand hours. If a light bulb is chosen at random: a) what is the probability the life span will be with - Competition in the class
There are 10 students in the class, of which 8 are girls and two are boys. We want to select three for the competition. What is the probability that they will be: a) 2 girls and 1 boy b) 1 girl and 2 boys c) 3 girls d) 3 boys e) at least 2 girls - 20 balls
20 colored balls in a bag: Four red Seven green Nine yellow What is the probability of picking a yellow ball? - Probability - dices We roll six dice. What is the probability that: a) a six falls twice b) six falls four times
- Students and exam
In a certain college, accounting is one of the courses. Among the accounting students, 60% are male. Among the male students, 75% passed the exams, while among the female students, 50% failed. (a) Present this information using a probability tree diagram. - The probability
The probability that a life bulb will have a more than 682 hours lifetime is 0.9788. The probability that a bulb will have a more than 703 hours lifetime is 0.0051. Find the probability that a bulb will last for more than 648 hours. - Five identical
Five identical coins are tossed. What is the probability of more than one head? - PIN code probability
When entering the PIN code, we used the digits 2, 3, 4, 5, and 7 only once. What is the probability that someone will guess our PIN code on the first try? - Dice sum probability What is the probability that if you roll the die twice, the sum of 12 will fall?
- Inspector ticket probability
There are 32 passengers on the bus, including three passengers who still need a valid ticket. After a while, an inspector got on the bus and started checking the tickets. What is the probability that he wanted to check the passenger's ticket without a tic - Strawberry candy selection
The opaque package contains five lemons, six apples, and three strawberry candies. At least how many sweets do we have to choose so that there is at least one strawberry among them? - Second prize Jamie and Mark each bought a raffle ticket for a draw of 125 tickets total. The first ticket drawn wins the prize of the winner's choice and is removed from the draw. The holder of the second ticket drawn wins the remaining prize. Find the probability tha
- Card number probability
On ten identical cards, there are numbers from zero to nine. Determine the probability that a two-digit number randomly drawn from the given cards is: a) even b) divisible by six c) divisible by twenty-one
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