Last years' survey of blood type on 100 Ethiopian servals that 20 peoples have blood type A, 30 peoples have type B, 40 peoples have type O and the remaining have type AB. What is the probability of getting an Ethiopian with blood type A and AB?

30%.

Step-by-step explanation:

The probability of getting an Ethiopian with blood type A is , which equals to 20%, while the probability of getting an Ethiopian with blood type AB is , which equals to and hence 10%. Therefore, just add the two probabilities together to get 20% +10% = 30%.

Hope this helped!

answer: bearing in mind that a rectangle has a perimeter of length + length + width + width.

step-by-step explanation:

p = perimeter

l = length

x=width

p = 2l + 2x

p = 2(l+x)     < ==== perimeter of the base of the box.