Suatu kelas yang berjumlah 25 siswa, terdapat 20 siswa yg senang sepak bola, 15 siswa senang bulutangkis dan 3 siswa tidak senang keduanya. banyaknya siswa yg senang keduanya adalah?

Muscles, a membership-only gym is hoping to open a new branch in a small city in pennsylvania that currently has no fitness centers. according to their research approximately 12,600 residents live within driving distance of the gym. muscles sends out surveys to a sample of 300 randomly selected residents in this area (all of who respond) and finds that 40 residents say they would visit a gym if one was located in their area. based on the past survey research, muscles estimates that approximately 30% of these respondents would actually join the gym if they opened one in the area. based on this information and the results of the sample survey, about how many residents should muscles expect to join its new branch? a) 134 b) 504 c) 1,680 d) 3,780

Is it true that product of 3 consecutive natural numbers is always divisible by 6? justifyyour answer

If g(x) is an odd function, which function must be an even function?