QUESTIONS AND ANSWERS 100%
ACCURATE 2025
Pam's computer printer allows for optional settings with a panel of six on-off switches in
a row. How many different settings can she select if there are no restrictions on the
switches? - ANSWERS64
Evaluate:
4! / 2!(4-2)! - ANSWERS4x3x2x1 / (2x1)(2x1)
Evaluate the expression: 9C4 - ANSWERS9! / 4! 5! = 126
Evaluate the expression: 9P4 - ANSWERS9! / (9-4)! = 3024
A teacher gives a test to a large group of students. The results closely approximate a
normal curve. The mean is 78 with a standard deviation of 4. The teacher wishes to give
A's to the top 7% of students and F's to the bottom 7%. A grade of B is given to the next
14%, with D's given similarly. All other students get C's. Find the bottom cutoff for a D.
Round to the nearest whole number. - ANSWERS72.1
If 9 fair coins are tossed, in how many ways can there be at least one tail? -
ANSWERS511
If a single card is drawn from a deck in how many ways could it be an ace or a red
card? Use the additive property. - ANSWERS28
I A contractor has 10 different models of homes to choose from. Currently there are
three lots open for building. In how many ways could the contractor arrange homes on
these lots? Assume three different models will be built. - ANSWERS720
Write the binomial expansion using Pascal's Triangle: (2x+3)^4
(Refer back to Pascal's Triangle for help) - ANSWERS16x^4 + 96x^3 + 216x^2 + 216x +
81
Suppose 200 geology students measure the mass of an ore sample. Due to human
error and limitations in the reliability of the scale, not all readings are equal. The results
are found to closely approximate a normal curve, with a mean of 74 grams and standard
deviation of 2 grams. Use the symmetry of a normal curve and the empirical rule as
needed to estimate the number of students reporting readings of more than 76 grams. -
ANSWERS32
f you toss 8 fair coins, how many ways can you obtain at least two head?