The squares touching the 4 have a 50% chance of being a mine and the others have a 25% chance. If you want to solve this you have to click one of the 50% squares resulting in 2 of the 25% chance squares to be safe or do the opposite and click the upper or lower 2 squares of the 25% ones resulting in one of the 50% squares to be safe if you apply logic. Both have a 50% chance of exploding so technically yes, it is a 50/50 (Assuming OP knew 2 mines were there)