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5 unbiased coins are tossed at random. T...

5 unbiased coins are tossed at random. The probability of getting at least two tails is -

A

`(31)/(32)`

B

`(27)/(32)`

C

`(13)/(16)`

D

`(1)/(2)`

Text Solution

Verified by Experts

The correct Answer is:
C
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CHHAYA PUBLICATION-MCQ ZONE -Question Paper 7
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  5. The angle between the normals to the planes x-y+2z=8 and 2x+y+z=12 is...

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  6. The acute angle between the normals to the planes the points (3, 2, 3...

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  7. If the lines (x-1)/(2)=(y-2)/(3)=(z-3)/(4) and (x-4)/(5)=(y-1)/(2)=(z-...

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  8. The equation of the line passing through the point (2, -3, 1) and para...

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  9. If the straight line joining the points (4, -3, 2) and (3, -1, 5) is p...

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  10. If veca=hati-2hatj+3hatk and vecb=-2hati+hatj-2hatk, then the value o...

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  11. A unit vector perpendicular to both the vectors hati+hatj and hatj+hat...

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  12. If the vectors vec alpha=hati+3hatj+hatk, vec beta=2hati-hatj-hatk an...

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  13. If |veca xx vecb|^2+(veca*vecb)^(2)=196 and |vecb|=2, then the value o...

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  14. If e^(y)+xy=e^(2) then the value of (d^(2)y)/(dx^(2)) at x=0 is -

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  15. Derivative of sin^(-1)x w.r.t. cos^(-1) sqrt(1-x^(2)) is -

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  17. The equation ax^(2)+bx+c=0 has one real root between 0 and k. If 4a...

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  18. If lim(x to oo) [ (x^(3)+1)/(x^(2)+1)-(ax+b)]=2, then the values of a ...

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