Question

please tell
plese plesae[

Answer 1

Answer:

1. 13x² + 12xy - z +(8xy + 10x² - 2y²)

= 13x²+ 12xy - z + 8xy + 10x² - 2y²

= 23x² + 20xy -2y² -z

3. n(S) = 5+6+4 = 15

Event W = getting white marbles

P(W) = no. of white marbles/ n(S)

= 4/15

Answer 2

Answer of first question

Second I donot do it.

Third is

total number of marble are =5 + 6 + 4 =15

P(the probability of choosing white marble from the container) =4/15