Spare coochie please

A bag contains green,yellow and black marbles.A marble is chosen at random. The probability of choosing a yellow marble or a green marble is 0.68. What is the probability of choosing: a)a green marble b)a black marble c)a red marble?

Abby writes a test in maths and in science.The probability that she passes maths is 0.6. The probability that she passes science is 0.7.The two tests are independent of each other.Calculate the probability that Abby: a)Passes science and fails maths b)Fai...

Abby writes a test in maths and in science.The probability that she passes maths is 0.6. The probability that she passes science is 0.7.The two tests are independent of each other.Calculate the probability that Abby: a)Passes science and fails maths b)Fai...

the mean of six numbers is 53 three of the numbers are 48 45 and 54.the other three numbers are all equal.find the value of these three numbers.

Express each of the following in the form ( x - m )^2 + n. c) x^2 - 5x

I have absolutely no idea how to do it and my teacher teach hecking fast too... Zinc reacts with hydrochloric acid and hydrogen gas.If 130g of zinc reacted completely, calculate the volume of gas formed.

+Also the probability of choosing a yellow marble is 0.26

Add in first line:Zinc reacts with hydrochloric acid to form zinc chloride and hydrogen gas...