NDA || Mathematics || Weekly Revision Quiz

What is the number of four-digit decimal number (<1) in which no digit is repeated?

If m is the geometric mean of

 and

then what is the value of m?

If the total number of observations is 20, =1000 and  then what is the variance of the distribution?

Three dice are thrown simultaneously. What is the probability that the sum on the three faces is at least 5?

Find the image of the point (4,-3,2) in the plane 3x-y+4z=2