# Recent questions in Probability and combinatorics

Probability and combinatorics

### $$\displaystyle{\left(−{2}{v}^{{2}}\right)}{\left({3}{v}\right)}{\left({5}{v}^{{5}}\right)}$$

Probability and combinatorics

### $$\displaystyle{\left(-{3}{j}^{{-{{5}}}}\cdot{k}^{{6}}\right)}^{{4}}$$

Probability and combinatorics

### $$\displaystyle{\left({3}{t}^{{2}}−{4}{s}\right)}^{{2}}$$

Probability and combinatorics

### Pure acid is to be added to a $$20\%$$ acid solution to obtain 28 L of a $$40\%$$ acid solution. What amounts of each should be used?

Probability and combinatorics

### $$\displaystyle{\left(−{2}{v}^{{2}}\right)}{\left({3}{v}\right)}{\left({5}{v}^{{5}}\right)}$$

Probability and combinatorics

### Sleep: Mean 7.35 and Range $$5.5-8.8$$ Light physical activity: Mean 8.71 and Range $$3.0-16.0$$ Moderate physical activity: Mean 3.36 and Range $$0.71-8.3$$ Hard physical activity: Mean 0.78 and Range $$0-4.1$$ Very hard physical activity: Mean 0.14 and Range $$0-1.05$$ On the average. how many hours per day did the women sleep?

Probability and combinatorics

### take two cards from a deck without replacement. what is the probability of getting a red queen and then another red card

Probability and combinatorics

### A wallet contains 1 five-cent coin, 1 ten-cent coin, 2 twenty-cent coins, and 2 fifty-cent coins. What is the expected value if you randomly select 1 coin?

Probability and combinatorics

### In how many ways can the 11 members of a soccer team line up, if the captain and assistant captain must remain together?

Probability and combinatorics

### $$\displaystyle{\left({7}{w}^{{2}}+{6}{w}{z}+{4}{z}^{{2}}\right)}−{\left({w}^{{2}}−{3}{w}{z}+{2}{z}^{{2}}\right)}$$

Probability and combinatorics

### Suppose that f is an exponential function with percentage growth rate of 5% and that $$f(0) = 4$$. Find a formula for f(x).

Probability and combinatorics

### Let L be an SList. Define a recursive function Wham as follows. B. Suppose L = x. Then Wham$$(L) = x \dot\mid x. R.$$ Suppose L = (X, Y). Then $$Wham(L) = Wham(X) + Wham(Y)$$. Evaluate Wham (2, 4), (7, 9) , showing all work.

Probability and combinatorics

### $$\displaystyle\frac{{{25}{h}^{{3}}\cdot{j}{k}^{{5}}}}{{{12}{h}^{{2}}\cdot{k}}}$$

Probability and combinatorics

### $$\displaystyle{6}{w}^{{2}}{\left({7}{w}−{14}\right)}$$

Probability and combinatorics

### $$\displaystyle\frac{{m}}{ Probability and combinatorics ANSWERED asked 2021-06-01 ### \(\displaystyle{\left(\frac{{{2}{c}^{{3}}\cdot{d}^{{4}}}}{{{3}{c}^{{2}}\cdot{d}}}\right)}^{{2}}$$

Probability and combinatorics

### $$\displaystyle{\left({3}{t}−{7}\right)}{\left({1}+{3}{t}^{{2}}\right)}$$

Probability and combinatorics

### Ten red cards and ten black cards are placed in a bag. You choose one card and then another without replacing the first card. What is the probability that the first card will be red and the second card will be black?

Probability and combinatorics