a) I have attached an image of a probability tree diagram.
b) 0.02332 (please round to where you need)
The probability that Terri chooses a blue pen is 2/7. The probability that Terri chooses a red pen is 4/7. The probability that Terri chooses neither a red nor blue pen is 1/7.
2/7 x 4/7 x 1/7 = 0.02332
Hope this helps! :)
The formula is
I=prt
I interest earned?
P principle 70
R interest rate 0.3
T time 2.5 years
I=70×0.3×2.5
I=52.5
Answer:
x=2
SK=21
KY=13
SY=34
Step-by-step explanation:
finding x:
SK+KY=SY
13x-5+2x+9=36-x
get x by itself
13x+2x+1x=36+5-9
simplify
16x=32
divide by 16 on both sides
x=2
Now plug in x (2) into the separate formulas
SK:
13(2)-5
26-5
21
KY:
2(2)+9
4+9
13
SY:
36-(2)
34
To double check your answer plug in what you got
SK+KY=SY
21+13=SY
34
and we got 34 above so this is correct.
