The number of participants with laptop is 115 and without laptop is 161
<u>Step-by-step explanation:</u>
Total number of participants= 276
Participants with laptop = (5/12) 276
= 115
Participants without laptop= 276 - 115
= 161

That's 7.68% = 7.7% (rounded)
Note: C(5, 4) is the number of combinations of 5 things taken 4 at a time. You may have seen this written as

In general,
Answer:
simple
Step-by-step explanation:
-4-4=3x
-8=3x
x=8/3
x=2.678
That ratio will be 5/100 because it's 5 out of 100 people
Therefore the probability is <= 5%