Question

A factory turns out an article by mass production methods .From the past experience it is found that 20 articles on an average are rejected out of every batch of 100 find mean and variance

Answer 1

tex]x ^{1.4} = 298 ^{1.4} \times 1 ^{0.4} \div 6 ^{0.4} \\ \\ the \: value \: of \: x \: \: is[/tex]
Then the value of 'x' is(Ref.Fig.):

A. -94
B. -145
C. -135
D. -74