Given p(a)= 0.4 and p(b) = 0.3 , if a and b are mutually exclusive events compute p(aorb)

For mutually exclusive events,  P(A or B)    = 0.7

Step-by-step explanation:

P(A) = 0.4

P(B) = 0.3

Here, A and B are mutually exclusive events.

⇒ A  ∩  B = Ф

    P(A  ∩  B) = 0

So, P(A or B)  = P(A) + P(B) - P(A ∩B)

=  0.4 + 0.3  - 0

= 0.7

⇒ P(A or B)  = 0.7

Hence, for mutually exclusive events,  P(A or B)    = 0.7

square pyramid

step-by-step explanation:

square prism looks like nothing like that

triangular prism has a rectangular base instead of a square base

tetrahedron has a triangular base

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.