299 and 233 by themselves are simply two sets of 3-digit numbers.
1812
It is 311.5 which is the number halfway between the two middle numbers.
No single number appears more than all others, but both 233 and 324 occur twice and could be said to be the mode.
The mean means find the average. Just remember the saying, "The average teacher is mean." The answer is 302.
New Zealand (299 times, whereas 233 for Australia)
299 + 299 = 598
233 x 233 = 54289
16: 211 223 227 229 233 239 241 251 257 263 269 271 277 281 283 293.
15% of 299= 15% * 299= 0.15 * 299= 44.85
35% of 299= 35% * 299= 0.35 * 299= 104.65
20% of 299 = 20% * 299 = 0.2 * 299 = 59.8
20% of 299 = 20% * 299 = 0.2 * 299 = 59.8