If 3 coins are tossed what is the probability of getting at most 2 tails with explanation

0.5 for at least 2 tails in 3 tosses.    0.38 for exactly 2 tails in 3 tosses

Step-by-step explanation: 0.5 is the probability of getting 2 Tails in 3 tosses. 0.38 is the probability of getting exactly 2 Tails in 3 tosses.

3. parallelogram

step-by-step explanation:

we turn each of our sides into direction vectors

ab=b-a=(3 - 7, 1 - 0) = (-4, 1)

bc=c-b=(1,6)

cd=d-c=(4,-1)

da=a-d=(-1,-6)

we see how the opposite sides have negated direction vectors; this is characteristic of a parallelogram.   we have congruent sides ab=cd and bc=da with unequal lengths because 1^2+6^2 is different from (-4)^2+1^2.   so it's not a square or a rhombus.  

we check the dot product of direction vectors of adjacent sides.   we have

ab dot bc = -4(1) + 1(6) = 2

that's not zero so the sides are not perpendicular.   we've ruled out rectangle.

the direction vectors indicate two pairs of congruent parallel sides, so we choose parallelogram over trapezoid.

5104.38 inches

step-by-step explanation: