Question

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Answer 1

Answer:

Thus P=19/500( 4th option)

Step-by-step explanation:

square of 1000=31.6

Thus there are 31 square no9 from 1 to 1000

Ns=31

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cube roots of 1000=10

so Nc=10

But 1,64 and 729 are included in Ns

so Nc=10-3=7

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Numbers which are square and cube both should be in the form of

x⁶ and x∈N

from 1 to 1000

there are 3 such numbers

1,64 and 729

These No are already in square no

So total of favoring numbers=31+7=38

Thus P=38/1000

=19/500

Thus P=19/500( 4th option)