She has a 1 in 5 chance of getting the green ball because there is one of each color marble
HHHH TTTT HHHT HHTH HTHH THHH TTTH TTHT THTT HTTT
HHTT HTHT HTTH TTHH THTH THHT
- is the sample space.
Total possible arrangements = 16.
Number with at least 2 heads = 11
Required probability = 11/16
2^1 because when you times indices you add the indices and when you divide you subtract it
Answer: The proportion of new car buyers that trade in their old car has statistically significantly decreased.
Step-by-step explanation:
Since we have given that
p = 48% = 0.48
n = 115
x = 46
So, 
So, hypothesis would be

So, test value would be

At 10% level of significance, critical value would be
z= 1.28
Since 1.28 < 1.72
So, we will reject the null hypothesis.
Hence, the proportion of new car buyers that trade in their old car has statistically significantly decreased.
1. Check the tree diagram in the picture attached.
2. The blue segment represents "on time"
The red segment represents "not on time"
3. blue - blue - red represents the case 1st on time, 2nd on time, 3rd not on time.
the combined probability is 90/100*90/100*10/100=9/10*9/10*1/10=99/1000=0.099
4. Remark with a tree diagram we can tell anything asked about the probability of an experiment.