King Abdullah, Custodian of the Two Holy Mosques, arrived here Monday afternoon on a three-day official visit. The King was received at Andrews Airbase by Secretary of Defense Robert Gates. King Abdullah is scheduled to hold talks with President Barack Obama Tuesday at 1 P.M. at the White House and with Secretary of State Hillary Clinton at 3 P.M. at Blair House. Tuesday's summit at the White House will see King Abdullah stress that the Arab world wants peace and justice based on United Nations' resolutions. Saudi Arabia wants Obama to play an active mediating role and pressure Israel to make concessions in pursuit of peace with the Palestinians.