Math Is Fun Forum

alikhan007

Member

Registered: 2010-10-03

Posts: 2

propability

The probability that an industry will locate at Lahore is 0.7, the probability that it will locate at Karachi is 0.4 and the probability that it will locate in either of the two cities or both is 0.8. What is the probability that it will locate: a. In both cities. b. In neither city.

soroban

Member

Registered: 2007-03-09

Posts: 452

Re: propability

. . . . . . . .

. . .

.

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: propability

Hi alikhan007;

Turn to your Venn diagrams. Draw two circles inside a rectangle with some overlap. Label the bigger circle L and assign .7 to it. Label the little circle K and assign .4 to it. The overlapping part gets a .3.

P(L) + P(K) - P(l intersect K)

.7 + .4 + P(l intersect K) = .8

P(l intersect K) = .3

Assign a .t to the recatangle that does not contain the 2 circles. You are done!

Welcome to the forum.

---

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

alikhan007

Member

Registered: 2010-10-03

Posts: 2

Re: propability

thank you so so much soroban and bobbym it helped me a lot....

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: propability

Hi alikhan007;

Glad to help.

---

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.