Is it permissible for one person
    to give the Jumu’ah khutbah and another to lead the prayers?
Question

                Is it permissible for someone to give
    the khutba and someone else to lead the salaat on friday, this happens at my mosque during
    ramadan where a shaikh was asked to give the khutba but for a hafiz/quran who was present
    to lead the salaat,is this correct because the shaikh said this is not of the sunnah, Jazakhalla Khairan
Praise be to Allah.Imaam Ibn Qudaamah (may Allaah have mercy on him)
    said: “Section: the Sunnah is for the same person to lead the prayers as gave the
    khutbah, because the Prophet 
 (peace and blessings of Allaah be upon him) used to do
    both himself, as did his successors (the khulafa’). But if one man gives the khutbah
    and another leads the prayer for a valid reason, this is permissible. This is what Ahmad
    stated…because if it is permissible for someone else to take over leading the prayer
    for a valid reason, then this applies even more so in the case of the khutbah with the
    prayer. If there is no reason, then Ahmad (may Allaah have mercy on him) said: ‘I do
    not like it if there is no excuse.’ The reason why it is not liked may be because the
    Prophet 
 (peace and blessings of Allaah be upon him) used to do both of them, and he
    said, ‘Pray as you have seen me praying’ (Reported by al-Bukhaari and Ahmad),
    and because the khutbah takes the place of two rak’ahs. The reason why it is
    permissible may be because the khutbah is separate from the prayer, as if it is two
    prayers.” (al-Mughni, part 2, Kitaab al-Jumu’ah: Fasl: yatawallaa
    al-salaah man yatawallaa al-khutbah. See also: al-Badaa’i’, 1/262, al-Sharh
    al-Kabeer, 1/499).
The fact that the one who leads the prayer knows more
    Qur’aan than the khateeb is not a reason for going against the Sunnah of the khateeb
    also being the imaam for the prayers. The khateeb should lead the people in prayer and
    recite whatever he can of Qur’aan, even if there are people behind him who know more
    than he does. And Allaah knows best.