There are 9 counters in a bag. 7 of the counters are green.
2 of the counters are blue.

Ria takes at random two counters from the bag.

Work out the probability that Ria takes one counter of each colour.

Ineed with 14, 16, 28 and 36 me. we didn't go over them in class so i don't know what to do.

What are the solutions of the system? solve by graphing. y = x^2 + 3x + 2 y = 2x + 2

Recall that the owner of a local health food store recently started a new ad campaign to attract more business and wants to know if average daily sales have increased. historically average daily sales were approximately $2,700. the upper bound of the 95% range of likely sample means for this one-sided test is approximately $2,843.44. if the owner took a random sample of forty-five days and found that daily average sales were now $2,984, what can she conclude at the 95% confidence level?