B.
The Probability of choosing a girl is 17/30.
The probability of choosing an A student is 5/30
<span>The P(girl) + the P(A student) = 17/30 + 5/30 = 22/30 = 11/15.</span>
Let , a, b and c be the length of three sides of triangle, represented in terms of vectors as
.
Now, vector of same Magnitude acts as normal vector to each side.
So, equation of any vector p having normal q is given by

Now sum of three vector and it's normal is given as

Cross product of two identical vectors is Zero.

Answer:
R=0.25
Step-by-step explanation:
Y=RX
2=R×8
2/8=8R/8
R=0.25