Question

**In a box of 24 iPhones, 8 are defective. If 3 are sold,
find the probability that all are
defective. **

Answer #1

A box contains 7 items, 4 of which are defective. a random
sample of 3 items are taken from the box. Let X be the number of
defective items in the sample. 1.Find the probability mass function
of X. 2.Find the mean and the variance of X.

A box contains 25 parts of which 3 are defective and 22
are non-defective. If two parts are selected WITH replacement, find
the following probabilities;
P (both are defective) =
P ( exactly one is defective) =
P ( neither is defective) =

3. A box contains eight defective and twelve good transistors.
If five transistors are drawn, with replacement, in succession,
find the probability of drawing at most three defective transistors
using the tables provided.
Pdf for formulas: http://docdro.id/HLm3Ta5

A box contains 4 defective and 2 good parts.
Two parts are selected from the box (without replacement), and it
is recorded whether the
selected part is defective or good.
The probability that the first selected part is defective and the
second selected part is good is
__________
The probability that exactly one good part is selected
is__________________
The probability that at least one defective part is selected is
_____________________

a package contains 9 resistor 2 of which are defective find the
probability of
0 being defective
1 being defective
2 being defective
3 being defective

QUESTION 5- A factory produces pins of which 1.5% are
defective. The components are packed in boxes of 12. A box is
selected at random.
(1) n =
(2) p = (Round to four decimal places)
(3) q = (Round to four decimal places)
Find the following probabilities (Round ALL answers to four
decimal places):
4) The box contains exactly 6 defective pins
5) The box contains at least one defective pins
6) The box contains no more than two...

Assume that the probability of a defective computer component is
0.02. Components are randomly selected. Find the probability that
the first defect is caused by the seventh component tested. How
many components do you expect to test until one is found to be
defective?

A box consists of 16 components, 6 of which are
defective.
(a)
Components are selected and tested one at a time, without
replacement, until a non-defective component is found. Let
X be the number of tests required. Find
P(X = 4).
(b)
Components are selected and tested, one at a time without
replacement, until two consecutive non defective
components are obtained. Let X be the number of tests
required. Find P(X = 5).

A manufactured parts is defective with probability 1/2 and being
defective or not is independent among all the parts. Bin A consists
of n + 1 parts and bin B consists of n parts. What is the
probability that bin A consists of more defectives than bin B?

An unbiased coin is tossed 15 times.
1. Find the probability that the coin lands heads exactly 9
times. a. 0.0003 b. 0.3571 c. 0.6429 d. 0.1527 e. 0.4213
2. Find the probability that the coin lands tails at most 3
times. a. 0.0002 b. 0.0037 c. 0.5000 d. 0.0176 e. 0.8723
3. Find the probability that the coin lands heads at least 3
times. a. 0.0005 b. 0.9963 c. 0.9333 d. 0.0003 e. 0.8890
A computer stores receives a...

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