pr=no:of favourable outcomes/no:of possible outcomes
no:of favourable outcomes=1
no:of possible outcomes=

77.11110 it’s the nearest hundred- thousandth
You didn't give us the sentence where the blank is placed.
Answer:
270 centimeters squared
Step-by-step explanation:
A = H x W / 2
A = 18 x 30
A = 270