Question

Anthony is making a collage for his art class by picking shapes randomly. He has five squares, two triangles, two ovals, and four circles. Find P(a square is not chosen first).

Answer 1

8/13

Explanation:

Total number of shapes = 5 (squares) + 2( triangles) + 2 (ovals) + 4 (circles)

= 13 shapes

P (of a choosing a square first) is given as =

\frac{Number of favorable outcomes}{total number of outcomes}

= 5/13

Therefore , 5/13 is the probability that a square shape is picked first.

Now, we know, probability , P + P' = 1

where P is the probability of happening any event.

& P' is the probability of that event not happening.

So, to find the probability of not picking up the square shape first, we do : 1 - {5/13} = 8/13

Therefore , 8/13 is the probability that a square shape is NOT picked first.