Answer:
15cm
Step-by-step explanation:
© the envelope is 15cm rall.
X takes values: { 3, 4, 5 }
where: P ( X = 3 ) + P ( X = 4 ) + P ( X = 5 ) = 1
For X = 3 we have : BBB or GGG.
P ( X = 3 ) = ( 1/2 * 1/2 * 1/2 ) * 2 = 1/8 * 2 = 2 / 8 = 1/4
P ( X = 4 ) = ( 1/2 * 1/2 * 1/2 * 1/2 ) * 6 = 6 /16 = 3/8
P ( X = 5 ) = ( 1/2 * 1/2 * 1/2 * 1/2 * 1/2 ) * 12 = 12 / 32 = 3/8
1 / 4 + 3 / 8 + 3 / 8 = 8 / 8 = 1
im pretty sure true because they do not intersect and are not parallel :)
The Answer is A because you are multiplying 4 into the a number (x) and 7 in the parentheses
June has 30 days
so 70% of 30 were sunny
0.70(30) = 21 days <==
