Math Answers

A company has 500 employees, salary of whom is normally distributed with an average of Rs. 40,000/- and standard deviation of 6,000/-. Suppose you pick a random employee from the 500 employees, what are the chances he/she earns less than Rs. 30,000/- ?

20% of the Chocos packets contain a free toy. Whats the probability youll need to open fewer than 4 packets before finding your first toy?

On an average, a bus stops at a certain point every 15 minutes. Whats the probability that no bus will turn up in a single 15 minute interval?

A man is bowling and the probability of him knocking all the pins is 0.3. If he has 10 shots, what is the probability that hell knock all the pins down less than 3 times?

In the latest format of KBC, there are 5 questions. Like you all know, each question has 4 options and only one option is correct. However, in the new format, you get a chance to answer all 5 questions irrespective of the fact that you answer it right or wrong. What is the probability of getting 2 or 3 questions right?

Youre trying your hand at snowboarding and observe the probability that the other snowboarder will make it down the slope without falling over is 0.4. What is the probability that you will need more than 4 attempts to be successful?

A pizza shop has a staff of 25 workers who deliver 175 pizzas in a day. Today, 5 of your workers have fallen sick and have taken a holiday. What is the probability that you will be able to service an increased demand / delivery of 25% today through the remaining workers?

A gambler plays roulette at Monte Carlo and continues gambling, wagering the same amount each time on Red, until he wins for the first time. If the probability of Red is 18/38 and the gambler has only enough money for 5 trials, then what is the probability that he wins on the second trial?

On a five questions, multiple choice test, there are 5 possible answers of which 1 is correct. If a student guesses randomly and independently, what is the probability that she is correct only on 2 questions?

The number of traffic accidents per week in a small city has a mean equal to 3. What is the probability of exactly 2 accidents occurring in 2 weeks?