Probability of exactly r successes in n binomial trials

1. A.
   $\frac{9}{10}$
2. B.
   $\left(\frac{1}{10}\right)^5$
3. C.
   $\left(\frac{9}{10}\right)^5$
4. D.
   $\left(\frac{1}{2}\right)^5$

Tap an option to check your answer.

1. A.
   0.2762
2. B.
   0.1852
3. C.
   0.2074
4. D.
   0.7235

Tap an option to check your answer.

1. A.
   0.1548
2. B.
   0.1458
3. C.
   0.01854
4. D.
   0.01458

Tap an option to check your answer.

1. A.
   $\frac{25}{216}$
2. B.
   $\frac{25}{36}$
3. C.
   $\frac{25}{108}$
4. D.
   $\frac{25}{104}$

Tap an option to check your answer.

1. A.
   $\left( \frac{4}{5} \right)^{4}$
2. B.
   $\left( \frac{4}{5} \right)^{4}\left( \frac{1}{5} \right)$
3. C.
   $\left( \frac{4}{5} \right)^{5} \times \frac{1}{5}$
4. D.
   $\left( \frac{4}{5} \right)^{3} \times \frac{1}{5^{2}}$

Tap an option to check your answer.

1. A.
   $\left( \frac{5}{6} \right)^{5}$
2. B.
   $\ 6\left( \frac{5}{6} \right)^{5}$
3. C.
   $\ 5\left( \frac{5}{6} \right)^{6}$
4. D.
   $\left( \frac{5}{6} \right)^{6}$

Tap an option to check your answer.

1. A.
   $(0.2)(0.8)^4$
2. B.
   $(0.112)(0.8)^4$
3. C.
   $(0.112)(0.8)^6$
4. D.
   $(0.2)^4(0.8)^4$

Tap an option to check your answer.

1. A.
   $\dfrac{26}{128}$
2. B.
   $\dfrac{24}{128}$
3. C.
   $\dfrac{27}{128}$
4. D.
   $\dfrac{28}{128}$

Tap an option to check your answer.

1. A.
   $0.1235$
2. B.
   $0.1677$
3. C.
   $0.1774$
4. D.
   $0.5321$

Tap an option to check your answer.

1. A.
   $22\left(\dfrac{9^3}{10^{12}}\right)$
2. B.
   $22\left(\dfrac{9^{12}}{10^{12}}\right)$
3. C.
   $22\left(\dfrac{9^3}{10^9}\right)$
4. D.
   $22\left(\dfrac{9^3}{10^{11}}\right)$

Tap an option to check your answer.