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#1 2019-04-29 22:27:45

MKNB
Guest

Probability (2)

Question : 
a)                  It is noticed that 70% of certain population of student like to wear jeans. A random sample of ten of those student is chosen. What is probability that no
                     one wear jeans.
b)                  The incidence of an occupational disease in an industry is such that the workmen have 20% chance of suffering from it . What is probability that out of
                     6 workmen none will contract the disease

#2 2019-04-30 01:43:57

Jai Ganesh
Administrator
Registered: 2005-06-28
Posts: 45,956

Re: Probability (2)

Hi MKNB,

a) 70% wear jeans. 30% don't wear jeans.
Number of students who don't wear jeans = 3.
Probability =

.

b) Percentage of occupational disease suffering =

.
Probability of 80% are not suffering by contracting the disease =
.
Number of workmen not contracting the disease =
.


It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

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