NIMCET 2011 Question Paper with solutions

Question : 32 of 120

Marks: +1, -0

Two variables have least square regression lines

3 x+2 y=26

and

6 x+y=31

, then correlation between

x

and

y

Solution:

Since, probability of defective razor blade is

0.002

. therefore, probability of non-defective razor blade is

0.998 .

∴ Probability of non-defective razor blade in one packet

= ^{10} C_{10}(0.998)^{10}=0.980179

∴ Required number of packets

=0.980179 × 10000

=9801.79=9802

(approx.)

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