If 14 out of 20 is correct, then that is : 14/20 = 0.70 = 70%
<span>cos t(sect- cos t)
sec t = 1/cos t so
= cos t( 1/cos t - cos t)
= cos t / cos t - cos²t (distribute)
= 1 - cos²t
since sin²t + cos²t = 1, we have sin²t = 1 - cos²t
so
= sin² t
=right-hand side
</span>
Tree C is the proper tree. The first game has the possibility of a win, a loss, or a tie which the first row represents. The second game could also win, lose or tie, meaning each result would have each possibilty for that game.
In order to accurately answer any fraction, it is best to have a common denominator (bottom of the fraction)
Since in
, 100 is the denominator, you need to make the other fraction with the same denominator
So Multiply
by <u />
So
or
You can do this another way which involves the opposite way of multiplying which is by dividing
Since you have to get a common denominator to measure accurately no matter what, you can divide
One thing to know is that when dividing fractions, both the denominator and numerator have to be divided by a factor to be divided and result in a whole number
÷
=
So just have to multiple
⇒
⇒
The results are the same
Again
is greater than