English

Prove that P(A) = PABPABP(A∩B)+P(A∩B¯) - Mathematics

Advertisements
Advertisements

Question

Prove that P(A) = `"P"("A" ∩ "B") + "P"("A" ∩ bar"B")`

Sum
Advertisements

Solution

To prove, P(A) = `"P"("A" ∩ "B") + "P"("A" ∩ bar"B")`

R.H.S. =  `"P"("A" ∩ "B") + "P"("A" ∩ bar"B")`

= `"P"("A")."P"("B") + "P"("A")."P"(bar"B")`

= `"P"("A") ["P"("B") + "P"(bar"B")]`

= P(A) . 1

= P(A)

= L.H.S.

Hence proved

shaalaa.com
  Is there an error in this question or solution?
Chapter 13: Probability - Exercise [Page 272]

APPEARS IN

NCERT Exemplar Mathematics [English] Class 12
Chapter 13 Probability
Exercise | Q 11. (i) | Page 272
Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×