Suppose each laptop of a certain type is assigned a series number, which consists of a sequence of eight symbols: number, letter, letter, letter, number, number, number, number, where a letter is any one of 26 letters and a number is one among 0, 1, : : : , 9. Assume that all series numbers are equally likely. (a) What is the probability that all symbols are dierent if one laptop is picked at random with equal probability? (b) What is the probability that all symbols are dierent and the rst number is the largest among the numbers?

- "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."

$75.00

step-by-step explanation:

i = prt

i = 1,5000 * 0.025 * 2

i = 75