Problem 799

Find the probability of correctly answering the first 2 questions on a multiple choice test if random guesses are made and each question has 6 possible answers.   Solution:-  …

Problem 798

If you pick a card at random from a well shuffled deck, what is the probability that you get a face card or a spade?   Solution:-    

Problem 798

Find the probability of correctly answering the first 5 questions on a multiple choice test if random guesses are made and each question has 3  possible answers.   Solution:-  

Problem 793

Two cyclists, 45 mi apart, start riding towards each other at the same time. One cycles twice as fast as the other. If they meet1 hr later, at what average speed is each…

Problem 791

A pot contains 7 L of brine at a concentration of 90 g/L. How much of the water should be boiled off to increase the concentration to 140 g/L?   Solution:- 2.5