Answer:
1/5 = 0.2, 25% = 0.25, 4 out of 20 = 0.2
Answer:
13/17
Step-by-step explanation:
Since we have 30 total students and 17 girls you would subtract 30-17 to get 13 and that would be boys, so the ration from boys to girls would be 13/17.
Answer:
This can be solved like this:
4x-3x+9=20
<em>Solving 4x-3x</em>
x+9=20
Transposing +9
x=20-9
And now we have, x=11
<h2>
The required probability is 0.1224.</h2>
Step-by-step explanation:
Here, given:
The probability of having 0 dental checkup = 0.3
The probability of having 1 dental checkup = 0.6
The probability of having 2 dental checkup = 0.1
Number of people chosen at random = 7
So, the number of ways 2, 4 and 1 checkup are :
Now, the combined probability that two will have no checkups, four will have one checkup, and one will have two checkups in the next year
=
Hence, the required probability is 0.1224.
Take the cos-1 of both sides to get 3x=30 then divide by 3 to get ×=10