Ther are 6 girls and 7 boys in a class. a team of 10 players is to be selected from the class. how many different combinations of players are possible

There are 286 possible combinations

Step-by-step explanation:

To solve this problem we must use the formula of combinations.

Where n is the number of players that there are and elect r of them

In this case there are 7 + 6 = 13 players and you choose 10 of them

Then we look for  13C10

There are 286 possible combinations

explanation:

infrared radiation has wavelength in the range between 700 nm and 1 mm. lets' convert these values into scientific notation, keeping in mind that:

let's start from the lower value, we have:

(we moved the dot two places to the left, so we increased the exponent by 2 units, from -9 to -7)

the higher value is:

so, the range of wavelength of infrared radiation is: