घटक X का वजन सामान्य रूप से वितरित (normally distributed) है। इसका माध्य वजन 5,200 किलोग्राम है और मानक विचलन (standard deviation) 430 किलोग्राम है। घटक X का वजन 6,000 किलोग्राम से अधिक होने की संभावित प्रायिकता क्या है?

A box contains 'x + 4' red, 'x – 1' green and 'x – 5' blue balls. If two balls are drawn from the bag one after another without replacement, then the probability of getting one red and one green ball is equal to the probability of getting a sum equal to or more than 8 when two fair dice are rolled. Find the probability of drawing a red ball when one ball is drawn at random from the bag.

Four persons are chosen at random from a group containing 3 men, 2 women, and 4 children. The probability that exactly two of them are children is: