can i put four 205/50 R15 tires on my 1995 toyota camry

Yes, but due to the difference in sidewall height, you will notice the following changes: 1) Your speedometer will read slightly higher than your real speed, so your speedometer will read 70MPH when you are really doing 65MPH. 2) The ride quality will be slightly more harsh than before. 3) If your Camry has all stock suspension components (as in, no lowering springs, etc.) the car may look slightly 'lifted'. 4) Your vehicle may be slightly more apt to 'bottom out' over bumps, dips, etc. than before. ....other than the relatively minor details I've listed above, you really shouldn't see any ill effects. I would like to note, however, that you should *never* put two different size tires on the front wheels, as that can do major damage to the transaxle.