Tiana flips a coin 3 times. the coin lands on heads twice and tails once, not necessarily in that order

Hi,

Ways of getting TWO heads in three flips..
3C2=3!/2!=3..

Total possible outcomes..
2*2*2=8..

Probability=3/8
B

If ABCD is a kite, then ∠A and ∠C must be equal to each other.
∠A = ∠C, so ∠C = 87°.

ABCD is a quadrilateral, so all of its interior angles must add up to 360°. We know 3 of the 4 angles, so we'll add them up and subtract the answer from 360.

∠A + ∠C + ∠D ⇒ 87 + 87 + 115 = 289
360 - 289 = 71

m∠B = 71°