A bag of 31 tulip bulbs contains 10 red tulip bulbs, 11 yellow tulip bulbs, and 10 purple tulip bulbs. Suppose two tulip bulbs are randomly selected without replacement from the bag. (a) What is the probability that the two randomly selected tulip bulbs are both red

Step-by-step explanation:

Given the sample space

10 red tulip bulbs,

11 yellow tulip bulbs, and

10 purple tulip

sample size= 10+11+10= 31

The probability of selecting the first red= 10/31

The probability of selecting the second red without replacement= 9/30

therefore the probability that the two randomly selected are both red is

=10/31* 9/30

=90/930

=9/93

The probability is 9/93

- "runner b is moving at a slower rate."

- "the graphs shown are graphs of distance(km) against time(min).

the slopes of this graphs are are given by:

slope = (change in y)/(change in x)

= (change in distance)/(change in time)

this is the formula for finding the speed. so, the slope of these graphs represent the speed of the runner.

taking each division in the graph to represent 1 on both axis:

runner a ⇒ speed = (2-0)/(1-0)

= 2/1

= 2 km/min

runner b ⇒ speed = (3-0)/(3-0)

= 3/3

= 1 km/min

this shows that   runner b is moving at a slower rate."

answer: 1inch=7days  

12inch=12*7=84days

step-by-step explanation: