To my understanding, miners with small computational capacity are merged within a pool with the advantage to reduce the variance of rewards.
does this miner merge all the computational power so that Pow is calculated quickly??
But it is said that the even in the mining pool , there will be only one miner who will solve the puzzle and the reward is shared by the others miners in the pool depending upon the shares solved by them . The miner leader will identify the ones which are active in solving with providing the puzzle with lower difficulty and share the reward with them.
If there is only one miner finally which solves the problem. How is this miner helped by other miner for computation? if this one miner uses only its computation power then what is different in mining solely?