The distance of the point P (-6, 8) from the origin is ___ units.

Which of the following cannot be the probability of an event?

If -2 and 3 are the zeros of the quadratic polynomial x² + (a + 1) x + b then a = ___ and b = ______.

The first three terms of an AP are (3y – 1), (3y + 5) and (5y + 1), the value of y is _____.

OR

If 18, a, (b – 3) are in AP, then value of (2a – b) is ____.

tan 10° tan 15° tan 75° tan 80° = _____.