engbaba
أبـو مـريـــم
السلام عليكم ورحمة الله وبركاته
السادة الاحصايون
برجاء ايجاد حا لهذه المسائل من فضلكم
There are two boxes inbox I, 11 cards are there numbered 1 to 11 and in box-II, 5 cards numbered 1 to 5. A box is chosen and a card is drawn. If the card shows an even number then another card is drawn from the same box. If card shows an odd number another card is drawn from the other box. Find the probability that
i. both are even
ii. both are odd
iii. if both are even. What is the probability that they are from box-I.
If measurements of the specific gravity of a metal can be looked upon as a sample from a normal population having a standard deviation 0.04, what is the probability that the mean of a random sample of size 25 will be "off" by at most 0.02?
A random variable x may assume four values with probabilities (1 + 3x). (1–x)/ 4, (1 + 2x)/4 and (1–4x)/4. For what value of x, does this define a probability distribution. What are its mean and variance?
ولكم جزيل الشكر
السادة الاحصايون
برجاء ايجاد حا لهذه المسائل من فضلكم
There are two boxes inbox I, 11 cards are there numbered 1 to 11 and in box-II, 5 cards numbered 1 to 5. A box is chosen and a card is drawn. If the card shows an even number then another card is drawn from the same box. If card shows an odd number another card is drawn from the other box. Find the probability that
i. both are even
ii. both are odd
iii. if both are even. What is the probability that they are from box-I.
If measurements of the specific gravity of a metal can be looked upon as a sample from a normal population having a standard deviation 0.04, what is the probability that the mean of a random sample of size 25 will be "off" by at most 0.02?
A random variable x may assume four values with probabilities (1 + 3x). (1–x)/ 4, (1 + 2x)/4 and (1–4x)/4. For what value of x, does this define a probability distribution. What are its mean and variance?
ولكم جزيل الشكر