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A question is given to two students A and B the probabilty of A solving the question are 6 to 9 and against B solving the question are 10 to 12. if both A and B attempt solving the question, find the probability of the question being solved?.
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Choosing a purple green black or silver bike having 10 18 22 or 24 speeds? What is the sample space

One letter tile is randomly drawn from a set of 26 alphabet tiles representing letters A through Z. What is the probability that the letter drawn is a vowel or is in the word “now”? Give your answer as a fraction in reduced form.

Two cards are drawn from a wellshuffled ordinary deck of 52 cards. What is the probability that they are both aces if the first card is not replaced?

For a group of 10 men subjected to a stress situation, the mean number of heartbeats/min is 126 and the standard deviation was 4. Find the 95% confidence interval of the true mean?

There is a 40% chance of rain on Tuesday and a 50% chance of rain on Friday. What percent chance will it rain both Tuesday and Friday?

11 students in the AP Calculus class received the following scores on their term final, who ranks in the 82nd percentile for the class?

On a multiple choice test with 19 questions, each question has four possible answers, one of which is correct. For students who guess at all answers how do you find the mean for the number of correct answers?

An urn contains 5 red& 2 black balls. Two balls are randomly selected. Let X represents the number of black balls, what are the possible values of X?

Rolf spent 15 hours last week practicing his saxophone. If #3/10# of the time was spent practicing warmup routines, how much time did he spend practicing warmup routines?

? A reporter for the local news station wants to know how the citizens of the area feel about the current gas prices. The reporter decides to gather this information by conducting a survey at the local golf course.
Part A
Determine if the chosen sample

Your test scores in one class are 80 and 88. What possible scores can you earn on your next test to have a test average between 84 and 89, inclusive?
Your score on the third test must be between
blank and
blank inclusive.

What is the probability of rolling at least one "1" if you roll a sixsided dice six times?

The probability of aren to solve a problem is 0.3 and the probability of alice to solve the same problem is 0.6 . Find the probability that the problem is solved by none of them?

What is the mean, median, and mode for 1,2,1,2,1,3,3,4,3?

What is hypothesis testing in Statistics?

A discrete uniform distribution results from recording the final digit of the cell phone number for 3,000 students. What is the mean of this distribution?

You roll two balanced dice one time. What is the probability that you obtain either a sum of 8 or the same number on each of the two dice?

What is the future value of a sum of money?

A course has two sections, Section A and Section B. On the most recent exam, Section A's 10 students averaged 80, and Section B's 20 students averaged 90. What is the course average for this exam?

You roll three dice, and you define the random variable #X# as the number of heads obtained. What are all possible values of the random variable #X#?

You have studied the number of people waiting in line at your bank on Friday afternoon at 3 pm for many years, and have created a probability distribution for 0, 1, 2, 3, or 4 people in line. The probabilities are 0.1, 0.3, 0.4, 0.1, and 0.1, respectively. What is the expected number of people (mean) waiting in line at 3 pm on Friday afternoon?