The red and purple presents together cost £25, The purple and blue presents together cost £27,
The blue and gold presents together cost £41,
The gold and green presents together cost £28,
The green and red presents together cost £25
What is the total cost of all five presents?

If you roll two fair dice (one black die and one white die), in how many ways can you obtain a 4 on at least one die?

The average number of vehicles waiting in line to enter a parking lot can be modeled by the function f left parenthesis x right x squared over 2 left parenthesis 1 minus x right parenthesis endfraction , where x is a number between 0 and 1 known as the traffic intensity. find the rate of change of the number of vehicles waiting with respect to the traffic intensity for the intensities (a) xequals0.3 and (b) xequals0.6.

An of a of 60. a of 36 is . isbe ?to .