Number of green balls = 87
Number of red balls = 41
So total number of balls = 128
Probability formula = number of events / number of possible outcomes.
So, the probability that a ball randomly selected will be a green ball will be
equals 0.6796875 converting to nearest hundredth as 0.68
The ratio is 96:3 or 96/3 all you have to do is just divide but not solve the question. It's like writing an expression.
Call the number of courses ' C '.
Whatever it is, it will cost her [ 55 + 450C ].
How many courses can she get for $1,200 ?
55 + 450C = 1200
Subtract 55 from each side:
450C = 1145
Divide each side by 450 :
C = 1145 / 450 = 2.544...
She can only register for a whole number of courses, so<u> 2 </u>is the limit.
That will cost her (55 + 2x450) = (55 + 900) = $955
and she'll have $245 left over ... not enough for another course.
Answer:
$2.65
Step-by-step explanation:
to get a weighted mean
divide the total revenue by the number of books
Revenue
(1.55 * 40) + (4.85 * 20)
$159
weighted mean
159/60
$2.65
