A drawer contains 60 pairs of socks. Each pair is one of four colors. What is the minimum number of socks that must be drawn, at random, from the drawer to ensure that a pair of matching-color socks is selected?

Answer is 30

Step-by-step explanation:

Total no. Of pairs = 60

No. Of four colours = 60/4 = 15

To ensure matching pair drawn at random, minimum no. Of socks drawn should be 15x2 = 30

to find the perimeter of the rectangle this is the expression:

x-9+x-9+3x-4+3x-4=138

if we simplify it:

8x-26=138

remember, 138 is what it all adds up to

the length is 11.5cm

the width is 57.5cm

the area is 661.25cm^2

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