An urn contains 4 black balls and 6 white balls. a ball is picked at random, the colour is noted and it is replaced with two additional balls of different colours. In a pick of 3 without replacement, find the probability they the three ball are; A. all white balls.
B. two white balls and one black ball.
C. at least one white ball​

The annual snowfall in a town has a mean of 38 inches and a standard deviation of 10 inches. last year there were 63 inches of snow. find the number of standard deviations from the mean that is, rounded to two decimal places. 0.44 standard deviations below the mean 2.50 standard deviations below the mean 0.44 standard deviations above the mean 2.50 standard deviations above the mean

Measure of angles 31 (x+4) (3x+9) me

Find all solutions for 2y - 4x =2 y = 2x + 1 site: socratic.org