Answer:
Step-by-step explanation:
P of red or green = (40 red+ 10 green)/ (40 red +50 yellow+10 green)
= 50/ 100= 1/2
This is a weird one. I'm going to work it, but I also want you to look back at the
book or the worksheet and make sure that you copied it correctly.
Because it's weird, I tell you.
| y + 9 | > 4
Subtract 9 from each side of the inequality:
<em> | y | > -5</em>
OK. Now, here we go:
'Absolute value' means just the size of the number, no matter whether it's
negative or positive. <em>So the absolute value of every number is positive</em>.
Got that ? <em>The absolute value of every number is positive</em>.
So <u>EVERY</u> number is a solution to this inequality. It doesn't matter what number
' y ' is, its absolute value is always positive. And if the absolute value is always
positive, then it's definitely always greater than -5 .
Weird ? I told you so.
Answer:
Question 1
Total number of marbles = 5 + 7 + 8 = 20
(a)
- P(red, red) = 5/20*4/19 = 1/19
(b)
- P(white, blue or blue, white) = 7/20*8/19 + 8/20*7/19 = 14/95 + 14/95 = 28/95
(c)
- P(both same colour) = P(red,red or blue,blue or white,white) =
- 1/19 + 8/20*7/19 + 7/20*6/19 = (20 + 56 + 42)/380 = 118/380 = 59/190
Question 2
(a)
- P(A and B) = 2/9 * 4/11 = 8/99
(b)
- P(not A and not B) = (1 - P(A))(1 - P(B)) = 7/9*7/11 = 49/99
(c)
- P(A or B) = 1 - P(not A and not B) = 1 - 49/99 = 50/99
Answer:
try Jiskha Homework Help
Step-by-step explanation:
The answer is 1.988 per pound