Mathematics, 15.12.2019 21:31, milliebbbrown

Abag contains 3 red marbles,3 green marbles, 3 yellow marbles and 1 white marble. you randomly draw a marble from the bag. without replacing it, you draw a second marvel. what is the probability that you draw two red marbles?

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answered: angelica19carmona

The probability of getting 2 red marbles is $\frac{1}{15}$

Step-by-step explanation:

A bag contains 3 red marbles, 3 green marbles, 3 yellow marbles and 1 white marble. You randomly draw a marble from the bag. Without replacing it, you draw a second marvel.

Need to find out the probability that you draw two red marbles.

Total number of marbles = 3 R + 3 G + 3 Y + 1 W = 10

Step 1: Let one ball is drawn then the probability that the drawn ball is red is

$P_{1}(r e d)=\frac{\text { no. of red balls }}{\text { total no. of balls }}=\frac{3}{10}$

Now the second ball is drawn without replacing the first drawn ball

Step 2: the probability of drawing red ball will be

$P_{2}(r e d)=\frac{2}{9}$

Now the probability that both the drawn balls are red is

$P(r e d)=P_{1} \times P_{2}=\frac{3}{10} \times \frac{2}{9}=\frac{1}{15}$

Hence, the probability of getting 2 red marbles is $\frac{1}{15}$

answered: Guest

"it's not the heat, it's the humidity". that's a partly valid phrase you may have heard in the summer, but it's actually both. the heat index, also known as the apparent temperature, is what the temperature feels like to the human body when relative humidity is combined with the air temperature. this has important considerations for the human body's comfort. when the body gets too hot, it begins to perspire or sweat to cool itself off. if the perspiration is not able to evaporate, the body cannot regulate its temperature. evaporation is a cooling process. when perspiration is evaporated off the body, it effectively reduces the body's temperature. when the atmospheric moisture content (i.e. relative humidity) is high, the rate of perspiration from the body decreases. in other words, the human body feels warmer in humid conditions. the opposite is true when the relative humidity decreases because the rate of perspiration increases. the body actually feels cooler in arid conditions. there is direct relationship between the air temperature and relative humidity and the heat index, meaning as the air temperature and relative humidity increase (decrease), the heat index increases (decreases).

step-by-step explanation: