12-04-2017
Mathematics

contestada

There are 5 blue marbles and 4 red marbles in a bag. One marble is drawn from the bag and placed back into the bag. Then, a second marble is drawn. What is the probability that the two randomly selected marbles are both red.

Respuesta :

12-04-2017

There are 9 total marbles and 4 red marbles, since we replace after choosing the probability of choosing two reds in a row are:

(4/9)^2=16/81 ( about 19.75%)

Answer Link

Otras preguntas

During the Carboniferous period, wood could not be decayed. What was the effect of this on the atmosphere?

To keep the temperature inside a house at 20 °C on a cold day when the temperature outside is -7 °C, the power consumption is 30 kW. Find the rate of entropy in

The vectors vector A and vector B both lie in the YZ plane. The vector vector C is equal to vector A × vector B. Which of these statements about vector C must b

A 15% tip on a restaurant bill is $3.60. How much is the bill?

A buffer was prepared by mixing 50.0 mL of 0.10 M HX and 25.0 mL of 0.10 M NaOH. The Ka of HX is 1.5 x 10–6. Calculate the pH of this buffer.

What is the market value per share at the beginning of the year if 30,000 additional shares of capital stock were sold for cash?

magkano ang babayarang buwis ng isang empleyadong may kitang 250,000.00 sa loob ng isang taon

Each employee can supervise one employee,a) no employees or many employees. b) each employee can manage many departments. c) each employee works in more than on

All official written communications transmitted to members will be limited to and classified as what ?

Harris Manufacturing is trying to determine the equivalent units for conversion costs with 60,000 units of ending work in process at 60%?