mohan514 wrote:
I do not think we have to do serious math to answer this question. Both events happening vs any one event happening. B would be greater for obvious reason.
Both events happening = 0.5*0.4 = 0.2
any one event happening = 0.5+0.4 - 0.9
Please correct me on Math part if wrong.
kruttikaaggarwal wrote:
I could figure out the A answer but I was not so sure of the method for B. Help please?
So lets see Quantity A: Both get degree = \(P(tom) \times P(john)=0.5 *0.4=0.2\).
Quantity B: Atleast one degree gets awarded. We can write the following cases:
Tom gets a degree John doesnot = \(0.5 * (1-0.4)=0.3\)
John gets a degree Tom doesnot = \(0.4 * (1-0.5)=0.2\)
Both get a degree = \(0.4 *0.5=0.2\)
Total probability for quantity B is \(0.7\).
Hence B is greater.
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92% (01:11) correct
